aznangelchick88 wrote:
My roommate comes up behind him and wraps her arms around his waist. I look at them and he moves her arms and walked away. I left the apartment and met up with a guy I'm seeing now.
SO you are already seeing someone else and you're upset with him and her?  Although, I do get the point that it's sort of a betrayal when it's supposed to be a friend/roommate and then you can't trust them as a result because they go after guys you like. I'd definitely keep all my feelings private in future and not let her know who you are interested in. 

I had a cousin like that.  When we were teens, if I even mentioned that another guy was cute, she'd go right after him.  Years later she had the nerve to say in front of a bunch of people how I always got her "leftovers".  I never once went out with any guy she dated!! I wanted to smack her so badly but I bit my lip but barely speak to her anymore for this and a number of other really douchey things she did to me.