Most relationships don’t fall apart because of one dramatic moment. More often, small habits – letting effort slide, brushing off a problem, keeping score – slowly wear down trust and closeness.

This guide covers eight common relationship mistakes to avoid, why each one hurts, and what to do instead. It also explains how to tell an ordinary rough patch from a relationship that isn’t safe, and when outside help is worth considering.

Quick answer

The relationship mistakes most likely to weaken a bond are: letting effort fade once you feel secure, losing your own identity, breaking the trust you’ve agreed on (including cheating), forgetting what matters to your partner, comparing them to other people, dismissing or avoiding problems, keeping secrets that affect them, and using the past as a weapon in arguments.

What helps instead is simple but takes practice: small, regular acts of attention, honest conversations started gently, taking responsibility for your part, and making sure your partner feels valued. No single mistake dooms a relationship. Patterns that are never repaired are what cause lasting damage.

Why small mistakes add up

Psychologists John and Julie Gottman have studied couples for decades. According to the Gottman Institute, stable and happy couples tend to have at least five positive interactions – interest, affection, humour, empathy – for every negative one during conflict. Negative moments still happen in healthy relationships; they are just repaired quickly.

The Gottmans also report that around 69% of couples’ conflicts are “perpetual”. These are disagreements rooted in lasting differences in personality or lifestyle, such as how tidy you each are or how much time you want with family. They don’t get solved so much as managed with respect.

That’s why everyday habits matter. Each mistake below either drains the goodwill a couple relies on or makes conflict harder to repair. Avoiding them is one of the most practical ways to protect the benefits of a stronger relationship, from emotional support to a happier day-to-day life together.

1. Letting effort fade once you feel secure

What it looks like: Early on, you planned dates, asked about each other’s day and noticed small changes. Now conversation is mostly logistics – bills, chores, school runs – and affection has become an afterthought.

Why it hurts: Partners often read less effort as less interest, even when the real cause is tiredness or routine. Over time, one person may feel they are carrying the relationship alone. That feeling comes up again and again when people ask for relationship advice online.

What to do instead:

• Keep small daily rituals: a proper greeting, a check-in message when you’re apart, ten minutes of phone-free conversation.
• Plan something to look forward to together. It can be simple and free.
• Ask what makes your partner feel cared for. It may be different from what you assume.
• Share the planning, so effort doesn’t always fall to the same person.

No amount of effort can guarantee a relationship will last, because it depends on both people. But consistent small gestures make closeness far more likely.

2. Losing your sense of self

Caring about how your choices affect your partner is part of a healthy relationship. Giving up your own friends, interests, opinions and goals is not.

What it looks like: You’ve dropped hobbies, see friends less, agree to things to avoid friction, or struggle to say what you actually want.

Why it hurts: Losing yourself can lead to resentment and dependence. It also puts pressure on your partner to meet every one of your needs, and they may miss the person they first fell for.

What to do instead:

• Keep at least one interest and a few friendships that are yours.
• Say your preferences out loud, even about small things like where to eat.
• Support each other’s time apart, and make big decisions together.

If you feel you’ve given up parts of your life because your partner pressures you to – for example, by discouraging you from seeing friends or family – that is a different issue. See the section on warning signs below.

3. Breaking trust, including cheating

Infidelity is one of the most painful breaches of trust a couple can face. What counts as cheating varies between couples. For some it means physical intimacy only; for others it includes emotional affairs or secret flirting online. That’s why it helps to talk about boundaries openly rather than assume you agree.

Why it hurts: Cheating undermines the sense of safety a relationship is built on. The partner who was cheated on often feels grief, anger and self-doubt, sometimes for a long time.

What to do instead:

• If you feel tempted, take that as a sign something needs attention. Address what’s missing in the relationship, or end it honestly, before acting on it.
• If cheating has already happened, the outside relationship needs to end, and the partner who cheated needs to answer questions honestly. Half-truths that come out later tend to reopen the wound.
• Expect rebuilding to take time. A qualified couples counsellor can help both of you work through it.

Some couples rebuild after infidelity; others decide to separate. Either can be a reasonable choice.

4. Forgetting the dates and details that matter to them

Forgetting a birthday or anniversary once doesn’t make someone a bad partner. It usually stings because it can feel like a sign of not being a priority.

What to do instead:

• Put important dates in a shared digital calendar, with a reminder a week ahead.
• Talk about which dates matter to each of you and how you like to mark them. Some people care a lot about anniversaries; others don’t.
• Remember everyday details too, like a medical appointment or a big presentation, and ask how it went.
• If you do forget, apologise without excuses and plan a thoughtful “do-over” around your partner’s interests. A gift can be part of it, but attention and follow-through matter more than how much you spend.

5. Comparing your partner to others

Comparisons can involve an ex, a friend’s partner, a sibling or the couples you see on social media.

Why it hurts: Being compared usually feels like being told “you’re not enough”. It can also slide into criticism of who your partner is, rather than a request about what they do. And social media shows other couples’ highlights, not their arguments or ordinary evenings.

What to do instead:

• Turn comparisons into specific requests. “Could we plan a weekend away this year?” lands far better than “Priya’s husband takes her away every year.”
• Notice and say out loud what you appreciate about your partner.
• If you find yourself comparing your own relationship to others, talk about the insecurity behind it rather than the comparison itself.

6. Dismissing or avoiding problems

Disagreements are a normal part of any relationship. The problem comes when concerns are brushed off (“you’re overreacting”), avoided, or met with silence. Unaddressed issues rarely disappear; they tend to grow.

The Gottman Institute’s research identifies four communication patterns, which it calls the Four Horsemen, that predict the end of a relationship when they become habits. It describes contempt as the single greatest predictor of divorce.

If you feel too overwhelmed to talk, the Gottman Institute suggests pausing and spending around 20 minutes doing something soothing on your own before returning to the discussion.

A simple way to raise a problem:

1. Pick a calm moment, not the middle of a busy morning.
2. Start gently: “I feel… about… and I need…”
3. Listen, then summarise what you heard before you respond.
4. Own your part, however small.
5. Agree on one small next step, and check in on it later.

7. Keeping secrets that affect your partner

Healthy couples don’t need to report every conversation, message or plan. Privacy – your own thoughts, a journal, a friend’s confidences, time alone – is normal and healthy.

Secrecy is different. It means hiding things that affect your partner or your shared life, such as debts, major spending, contact with an ex you’ve agreed to limit, or plans that involve them.

Why it hurts: When a secret comes out, the hiding often damages trust more than the thing that was hidden.

What to do instead:

• Share information that affects your shared life early, even when it’s uncomfortable.
• Agree together on what you each expect around phones, money and contact with exes.
• If you’ve been hiding something, tell your partner yourself rather than waiting to be found out.

Openness is not the same as surveillance. Demanding passwords or tracking a partner’s phone without their agreement is a form of control, not honesty.

8. Using the past as a weapon

This mistake takes two forms: judging your partner for their life before you met, and dragging old mistakes from your relationship into every new argument.

Why it hurts: Your partner can’t change their past. And phrases like “you always” or “you never” turn a single complaint into an attack on their whole character.

What to do instead:

• Accept that your partner’s history before you is part of who they are.
• Keep each argument to one issue.
• If the same old hurt keeps resurfacing, it probably wasn’t fully resolved. Give it its own calm conversation, possibly with a counsellor, rather than letting it ambush every disagreement.

Rough patch or unhealthy relationship?

Every couple goes through hard seasons, and the mistakes above are ones most people make at some point. But some patterns are not communication mistakes. They are warning signs of a controlling or abusive relationship, such as:

• feeling afraid of how your partner will react
• your partner checking your phone, messages, location or money without your agreement
• being cut off from friends or family
• constant put-downs, threats or intimidation
• physical violence, or being pressured into sexual activity

If this sounds familiar, couples counselling is usually not the right first step; individual support from a specialist service is. In an emergency, call your local emergency number (112 in India, 000 in Australia). In India, women can call the government’s Women Helpline on 181, which operates 24/7. In Australia, 1800RESPECT (1800 737 732) offers 24/7 support for anyone affected by domestic, family or sexual violence. Elsewhere, contact your national domestic abuse helpline.

When couples counselling can help

Counselling isn’t only for relationships in crisis. It can help when:

• you keep having the same argument without getting anywhere
• trust has been broken and you both want to rebuild
• you’ve drifted apart and don’t know how to reconnect
• a big life change, such as a new baby, a move or an illness, is putting you under strain

Look for a qualified, registered counsellor or psychologist who works with couples. Counselling tends to be most useful when both partners are willing to take part.

Keeping your relationship strong

Strong relationships aren’t free of mistakes. They’re the ones where both people notice when things drift, own their part and make repairs. Rather than tackling all eight at once, pick one habit from this list to work on this week.

For more practical reading, browse our relationship articles and wider lifestyle guides.

This article offers general information and isn’t a substitute for advice from a qualified counsellor or psychologist.