If that bitch was dumb and mean enough to bring the dude to tell you how she felt, you didn't want this girl in the first place. And don't beat up her new boyfriend; I don't understand why the fuck people do this. It's the GIRL's fault, if anybody's. And I didn't get any reasons as to why she broke up with you. What'd you do to her? What she did is pretty harsh. She just did it out of nowhere? If so, like I said fuuuuuck her. You can do better than that. And don't slap either of them around. Be the bigger person and forget the whole thing ever happened. Get another female and you'll forget about it. Life goes on.