Honestly, yes that's screwed up, but at least he told you. And at least she did while you were guys were separated. Not saying what she did was right, or that you don't have any reason to be angry. But there are plenty of people out there that would've called themselves your friend and girlfriend, but be boning each other behind your back.

Sorry to hear op. You deserve a lot better than that!

Now you know she's not loyal. Maybe it was for the best

Is it possible she broke up with you just so she could have sex with someone else and not feel guilty?

"WE WERE ON A BREAK" - Ross

Ditch her. If she can **** another guy that fast, especially your friend, she may not be the loyal or caring type anyway. You can do better than that, someone else not as easy and slutty.

Same thing almost happened with my mate. He doesnt like to go out to nightclubs so me and his missus used to go out all the time. Id look out for her and she would be my wingman. One time we got too drunk and we made out, we admitted our mistake and told him immediately and all was forgiven. One year later they broke up and she came straight to my place and tried to sleep with me. Shes extremely hot and id be lying if i said i hadnt thought about it but i said no and kicked her out. Told my mate what happened and the next day she tried to go back to him but he already knew what she had tried.

I'd be miserable, good luck with that.

You don't deserve them.

At least the "friend" came clean... Now, who to dump the girlfriend or Guy friend... Hmmm