I guess I'm in the 2%....but anyway, force her to have fun. Include her in the night. Dont just let her sit on the computer by herself. I think that you must care a lot about her or you wouldnt have posted this delima on the forum, so show her you care. If she doesn't have fun, try to not keep ppl there too long and whatever you do DON'T tell your friends you want them to leave because of her! Maybe she feels threatened by the girl?? Anyway, just pay a lot of attention to her....then tomorrow, get her some flowers.