My initial reaction to this thread is that she is not intentionally trying to play you or anything like that. She is probably stressed with schooling. Her friends are probably pressuring her to go out and have fun at parties, etc. She is worried about life/career/etc after the next couple weeks. She has a semi-serious/casual thing with the OP going on, but he is asking for commitment after a very short time. And who knows how many other things are going on in her mind right now.
My point is this - cut her some slack. She probably doesn't know what she wants herself right now. I would bet that if you sat her down and asked her what she wants for dinner she would have a hard time figuring it out. She sounds like she is swimming in her head right now and is doing her best to please everyone, including herself. Let her clear out some of the noise around her and then she might make a little more sense to you.
Good luck.
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