So first of all, I like a girl. She's shown signs of liking me. I feel I've played it a bit too cool around her, I rarely if ever comment on her Facebook and at once I gave her a hug, although I do try to talk to her in person whenever I can. We've been speaking for about two months.
So yesterday I was with her and she started being flirtatious towards two guys. One of them, a mate of mine who has a girlfriend (which I would assume she's aware of) she went over to him and rubbed his arm as a greeting. Then she started rubbing his back, and grabbing the back of his head.
This actually hurt quite a bit. She tried striking up a conversation later on about a teacher when it was just me and her, and I just responded with one-worded responses, because she just made me feel miserable. And maybe subconsciously I was trying to make her feel bad, or aware that she had upset me.
But would the "act distant/guilt trip" thing be a good move? If not, how should I deal with a girl like this?