Dealing with OCD and Intrusive Thoughts about Cheating

I developed OCD around me cheating really badly. I think it started last year then got worse overtime. I started obsessing about a male friend. Then it went to this game I used to play. I started obsessing over a virtual game because people would name some of the rooms inappropriate labels and the main purpose of the game was to collected clothes and get gold and design stuff etc so that’s what I did mainly. But my brains like “what if you dated someone and don’t remember” even tho that never happened. My boyfriend don’t care about the game. But im really worried on the other hand.