Study buddy or more?

This girl who's in my class asked me last week to be her study buddy because we had a big test coming up...we also live in the same apartment building. I came by her place as she was leaving to remind me to come over and we bullsh*tted for an hour before we started studying. She laughed at all my jokes, direct eye contact was consistent, we teased each other a good bit, and we made a deal that if she did better on the test than me (I pretty much had to guide her through the study guide) that I owed her a smoke up. But I can't tell if she likes me or just likes hanging out with me.

She mentioned to me about a couple guys who are always flirting with her that she's not interested in, she's not into muscular guys (I'm kinda inbetween skinny and muscular) and emphasized "ex-boyfriend" in some story she was telling. But she also mentioned some guy in our class she finds hot, and I'm not sure what to make of that of that.

She's really hot so I'd like to make a move, but if I'm wrong it will be pretty awkward since we live two doors down, her roommate is friendly with some my other friends and we are in the same class...so I kinda want to be sure.
Study buddy or more?
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