So... you and this girl have been together for almost 3 years now. She is still in school and you graduated. You go to pick her up from her house after school and when you get there you see her kissing another guy and him grabbing her ass. (I rode with one of my friends to go pick up his girl and this happened.) It absolutely pisses me off, like I cannot stand this at all. So a day after, I texted her for him and told her she was a whore and had no respect for a decent relationship and to fuck off cause she did that to whom I call my blood brother even though he is just a best friend. What the entire fuck would you do? Should I have just stayed out of it? He didn't want to say anything but I was there to say it. I can't stand a fucking cheater.