So I found out that my girlfriend has been talking to a guy that I really don't like behind my back. It's been done via facebook messaging (not IM). I'm trying to find a way to tell her I found out, besides telling her that I saw it on her phone, (which is how I did). How can I do this so I can confront her with it? Is there some way to find out on facebook? She's not his friend, I made her delete him. The guy is a douche and he messes around with other peoples' girls.