Bitch Much??

I like a boy named Race. His girlfriend is my friend on facebook and yesterday she asked if I liked Race. I knew she knew so I said yes. Then she said,'I don't like it when other people like my boyfriend.You might as well stop liking him because he is mine and only mine.' Uh, WTF! Then she started going on about how I'm a stalker(which im NOT) and crap like that.I thought about telling her I'd stalk her and kill her in her sleep just to cause trouble, but decided against it. What should I do about the mother f*ucker? I never did anything to her.