<human>: Can you condense the text into three sentences or less?

In my first week of university i met a girl, let's call her femanon. She is in her third year but only a year older (i took a fifth year), and i instantly liked her, probably because she was beautiful and talked to me. i found out she already had a boyfriend so i immediately backed off, and after about a week of hangout with a group of people (including her) i looked at her as a friend and not as a possible romantic partner, and for about two months things were great.

 3 weeks ago as i was sitting next to her in our usual hangout spot, she started flirting with me. at the time i didn't know she had broken up with her bf a month earier, it just never came up. So you can imagine my suprise when I felt her head on my shoulder. i didn't say anything of it and for a week after nothing changed. since then she has been acting strangely around me.  sort of half flirting but still sounding like a friend.

Since then i have been fighting with myself over what to believe (me being the shy guy who never really put a lot of effort into romantic relationships) so on monday i asked her to lunch. she dropped everything, got food and hung out watching the it crowd for 2 hours talking about film, music, past relationships.  It felt right but i still didn't know for sure.

Today, 40 minutes ago to be correct, i asked her to dinner. she said no, which i was ok with, but immediately after she started acting very closed off to me.  so i'm now just sitting here, not knowing what to do, did i just fuck up a good thing, did i jump the gun? what do you guys think, how bad does the situation seem?
<bot>: guy likes girl, girl dating other guy, guy befriend girl, girl breaks up with other guy, girl cozzies up to guy, guy likes girl again, guy asks her out, girl says no, girl acts different.