So just recently I found out that my ex is messing around with a good friend of mine. This was right after we broke up and she's been keeping it a secret for quite a long time. She still means a lot to me and I really feel like shit right now. What bothers me is that I keep visualizing and thinking about how they are having sex. And I can't seem to find a way to get the thought out of my head. I masturbate every time I think about it. Anyone ever have the same problem?