Most Helpful Guys
She's being sketchy as hell by being so upset about it. I think she liked the attention, which is alarming. If there's a next time, tell him that you wanna have a talk with him outside, and there you can fight. It's possible she was just upset about being thrown out, though
Ask her why she's mad. If the answer is anything besides being mad she was kicked out, dump her.
Most Helpful Girl
Well, I don't know the complete story, but maybe she got scared by the way you reacted? Or maybe she just doesn't like you being jealous?