At a glance
Cheating on someone you love leaves two true things side by side: you wanted this relationship, and you acted against it. Often the sharpest pain is that you cannot account for it, even privately. This piece looks at what an affair may have been seeking, and how to carry an explanation without letting it become an excuse.
Clinical insights from 22 years in psychotherapy
I’m Mark Colclough, MA, psychotherapist in Copenhagen. Qualified at the Psychosynthesis Education Trust and the University of East London. 22 years of full-time, face-to-face clinical practice.
- No answer to the obvious question. Clients who reach me after an affair can usually walk me through every step of it, then stall when I ask what they hoped it would give them.
- A hunger older than the affair. What tends to surface is a part of life clients had given up expecting, which the other person briefly made possible again.
- Telling to be relieved. The pull to confess is often strongest when guilt peaks, and that is when disclosure serves the teller more than the partner.
Clinical notes: My observations are anonymised and compounded from my session notes since 2004.
Why can’t I find an answer that fits?
Each explanation you try is either too slight for what you put at risk or too sweeping to be honest.
Telling yourself it was meaningless makes you someone who gambled a whole life on nothing, and you cannot live inside that. Telling yourself the love had gone does not match the panic that rose in your chest when you pictured losing them. So you keep the question at a distance, and not knowing becomes a sentence you serve. That is easier than it sounds, because a punishment at least gives the feeling somewhere to go.
When you look for the reason behind cheating on someone you love, you probably hope for one cause. In my clinical work it is almost never single. More often there are small needs left unspoken for months or years, an opening that appears, and a stretch of time in which you had lost touch with how you were actually doing.
Does this prove I didn’t really love them?
You can love someone and betray them in the same period of your life, and admitting that is harder than labelling yourself a bad person.
The verdict that you are simply bad arrives fast and closes the enquiry. It also leaves nothing to work with, and it quietly takes your partner out of the frame, because condemning yourself is still a private exchange with yourself. The harder position is that you wanted the relationship, acted against it, and both of those came from you.
One review of infidelity research describes eight motives people commonly give, including anger at a partner, feeling neglected or badly treated, low commitment, a wish for autonomy, wanting more sex or more closeness, and circumstances such as stress that cloud judgement.1 It is a narrative review, pulling together earlier studies rather than testing anything new, so treat the list as a picture of what people report, not a diagnosis of you. What I notice is how few of those motives concern the other person.
What was I really looking for?
More often a state of being than a particular person: feeling desired, feeling new, being answerable to no one for an evening.
- To be seen. A kind of attention that had seeped out of daily life, including the attention you no longer gave yourself.
- Anger without an outlet. Resentment that had no permitted shape at home and came out as a deed rather than words.
- A shelved version of you. Who you were before the roles took over, suddenly within reach and startling to encounter.
- Something private. When shared life has become scheduled and accounted for, an affair can turn into the one corner that is yours alone.
Hold these up against your own experience; they are possibilities, not a portrait. Understanding a reason does not grant permission, and knowing why changes nothing about the hurt your partner carries. The case for looking is practical rather than moral. Needs that stay unspoken do not become safe by staying silent, and while you cannot name them, the door they came through stays open.
Why does my guilt keep shifting?
Guilt concerns what you did; shame concerns what you have concluded you are. They pull opposite ways, yet most people feel them as one.
Guilt keeps your partner in sight and moves you towards repair. Shame turns your gaze inward, and from outside it can look like coldness. You cannot stand being with yourself, so you pull away or bristle, and your partner reads indifference at the very moment they need the opposite. Numbness is part of this as well. If a feeling is too big to take in, sometimes nothing arrives except a weight in the chest or a flat morning, and people mistake that blankness for not caring.
The same mix-up fuels the urge to confess in the middle of the night. Telling your partner may be right and may be honest, but the hour when guilt presses hardest is the hour when telling mainly eases you. Better to know that before you speak than after.
What now, and when is insight the wrong task?
Stop the contact first, since any conclusion you reach while it continues is unreliable.
- End it cleanly. Not paused, not kept friendly, not left open as an option.
- Write down what you were missing. The months beforehand, in your own words, without listing your partner’s shortcomings.
- Separate explanation from excuse. Holding a reason without letting it harden into a defence is a skill, and it takes repetition.
- Know which question you are answering. Wanting to stay in this relationship and being able to live with yourself are separate matters; merging them tends to settle neither.
- Allow for slow change. Understanding can arrive in a week while nothing feels different for months, and that lag is normal, not failure.
Sometimes this is not the right task yet. While the affair is ongoing, reflection becomes a way of postponing a decision. Where your partner has only just discovered it and is reeling, their state and the coming weeks matter more than your motives. And where fear or control runs through the relationship, in whichever direction, that needs attention before anything else.
If you would like to explore this without your partner present, online couples therapy alone is built for one person working on a relationship question by themselves. Sessions run by video wherever you live, and a free 30-minute call is an easy way to begin.
Questions people ask
Could I start therapy without my partner knowing?
Yes, many people begin privately. What you then do with what you learn is a separate choice, and it can wait well beyond a first meeting.
Are you going to push me to confess?
No, that choice belongs to you, and its consequences deserve careful thought rather than impulse. My role is to help you understand what took place and why it matters, not to hand down a ruling.
Should I do individual work before couples therapy?
Often that order helps most. Having looked at your own part first, you come with more to offer than an apology.
What does a first session look like?
You tell me what happened and, more importantly, what you have not yet been able to say aloud to anyone. I am as curious about the months leading up to it as about the affair.
Is it too late if the affair was long ago?
No, and plenty of people come years later. Something you did and have never managed to explain usually keeps colouring the way you are with yourself.
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Sources
How this article was written: I choose the subject and the angle. An AI assistant researches and drafts. I read the draft, correct and improve it and stand behind every clinical statement. The professional and clinical judgement is mine.
