A bunch of nothing

I'm sitting here in class with nothing to do, but with everything on my mind. I'm not feeling to well right now, but that's not stopping me from being angry. You see I have this friend and as much as I love her, she pisses me off really bad. You see she has this boyfriend she broke up with him for another boy then started going back out with him. She has recently been playing this game called "Magic" and has been playing with my ex boyfriend and this other cute looking boy. Well I told her I liked him and she said she'd talk to him for me but has since been moving in on him herself. Now keep in mind that she already has a boyfriend and I am single. Well she has also been flirting with my ex too, which pisses me off. I'm half tempted to call her boyfriend at tell him what is going on because I think he diserves more than what is going on, he is a great person. I just don't know what to do and I'm really pissed off.