does anyone else have cheating ocd? this is literally the worst theme i’ve had ever. it feels so true and real even though the evidence to disprove it heavily outweighs the evidence to prove it actually happened. does it feel extremely true for anyone else?

It's a really terrible theme, especially because it can affect your relationship with your SO. No matter how much evidence there is, there will still be that "what if" seed in the back of your mind. Try to let that seed sit in the corner, dried out. Don't water it. That feeling of "extremely true" is very, very hard to overcome :(. Try to trust yourself and your partner. I know it's so much easier said than done though.

I haven't had this one, but I've been in a situation where I got a real life OCD that I'd done something much worse than cheating, and that I'd done it on purpose. Even though, as you say, the evidence against was way more than the evidence for. The only evidence for, in fact, was the fact that I felt guilty. I had no memory of it. Because it didn't happen. But the feelings were enough for me to think that I did and had repressed the memory or forgotten about it, or was deluding myself somehow to think that I hadn't. And that I needed to just accept and embrace that I had. I can't even properly explain it to people without OCD because it sounds like pure delusion. So I know how intense the feeling of reality to OCD can be. That reality feeling is usually stronger the more I have been doing compulsions and treating the thoughts and feelings like they mean something. Especially when I have been reassuring myself with evidence against it. It's a paradox but yeah. Arguing with it just makes it feel more true. It doesn't matter how unlikely the thought is and how unfair it is that we have to experience it. Our best choice is still to practice letting it be there without solving it.