So last month I talked to an extremely pretty girl in one of my classes who I am sure had a crush on me for most of the semester because she always looked at me and smiled. When I finally talked to her she offered me her number and complimented me on my clothes so I thought she was pretty interested.
I asked her to hang out once but she had to go back home as classes were ending that next day.
We texted a few times and she seemed really enthusiastic but then she would never reply (or take a while to text back). I went home for break and didn't really talk to her (I did send her a text on Christmas which she enthusiastically responded to) and now since I've been back at school when I see her or walk by she takes her phone out pretends to look at it or just ignores me.
What should I do? I can't stop thinking about what I may have done to her and it's killing me! Has my window closed? I was going to ask her out on Valentine's Day but if she doesn't like me then I'll just move on.