What could it mean?
Whatever this dream showed you, it is not evidence about anybody. Start there, before you start reading anything into it.
— Vera
Few dreams cause as much real damage as this one, and almost all of it comes from taking it literally. So let us be plain: a dream in which your partner was unfaithful says nothing whatsoever about your partner, and a dream in which you were says nothing about what you want. These dreams are extremely common in relationships that are entirely solid.
The reading most often offered is not about sex but about trust and attention — a fear of being replaced, a sense of distance, a period where one of you has been elsewhere in your head. The feeling on waking, usually, is the actual content of the dream.
Betrayal is one of the oldest story shapes there is, and in dreams it frequently attaches to something other than a relationship: work, a friendship, a promise to yourself. The partner is simply the nearest face for it.
Some readings treat it as a question about where your attention has gone rather than about anyone's conduct. That framing is gentler and, going by what dreamers report, closer to how it usually turns out.
Your dream is more than one symbol.
Dreaming it and dreaming you found out are two different dreams. Tell Vera what actually happened in it.
Interpret my dream →I dreamt my partner cheated. Should I be worried?
No. A dream is not information about another person, and it cannot see anything you cannot. Bringing a dream to your partner as an accusation has ended relationships that had nothing wrong with them — please do not treat it as evidence.
Does dreaming about cheating mean I want to?
Generally not. These dreams turn up in people who are perfectly content and have no intention of anything. Desire in a dream does not translate directly into desire awake.
Why did it feel so real?
Dreams with strong emotion often carry into the morning, and this one carries further than most. Waking up angry at someone who was asleep beside you all night is a strange and very common experience.
Should I tell my partner?
That depends entirely on the two of you. If you tell them, it is worth being clear it was a dream and not a suspicion. What the dream might usefully point at is a conversation about distance — which is a different conversation from an accusation.
Why do I keep having this dream?
Recurrence usually tracks something ongoing rather than something specific — a stretch where you have felt less attended to. That is worth noticing, and it is still not evidence about anyone.