Search Results: cheating situation

So, I have a friend (20 F) who is dating the friend (26 M) of my ex (21 M). She has revealed to me that he has told their group of friends that the reason for our break up is because I was going out to clubs every night and that it was affecting his father's health (I was staying with his parents at the time time, while he was at university). That is obviously not the truth, and she said that he is saying this to gain sympathy from his friends (who were on my side after the break up). Truthfully, he cheated on me while we were long-distance and I found out from another friend. He never owned up to it and still continues to deny it, even though he began dating a new girl right after dumping me. Now, I have not talked to him since our break up a year ago but hearing that he is spreading this lie to cover up for his cheating really irritates me because he is making it look like I am the one at fault. If you were in this situation what would you do? Would you confront him about lying about you or would you just let it go?

I'm curious to see If cheating is more common than we think.
I believe monogamy isn't exactly natural, but I also think it depends on the person and situation.
Sometimes people cheat because they're fucking assholes and sometimes they do it cuz they actually have a very good reason.
For example, I was in a "relationship" with this one guy a couple of years ago and he did not know what he wanted. It went from I want a relationship to I don't wanna lable us to I wanna be friends with benefits to me cheating on him because I felt rejected by him and I was in love with him. The dude would flirt with girls IN FRONT OF ME.