<human>: Can you provide a brief rundown of the text in within 3 sentences?

Ok so there is this girl I have recently started talking to in one of my classes. One day I saw her sitting by herself before class so I just walked up to her and started a conversation.Ive probably seen her and talked with her before class like 3 times a good 30minutes before class. I think I would say we have chemistry because honestly we could talk for hours, about almost anything. Whenever I see her in person, she seems like she is interested, but she is giving me signs that seem otherwise. I asked for her phone number and she gave it to me, the next day I texted her but she didn't really seem like talking(short responses, not keeping up conversation).Well yesterday I caught up with her after class and walked her to her car.

She offered to drive me to my car, and after we ended up sitting in her car and talked for an hour about some personal stuff. She told me how she used to be addicted to heroin and other things about her life and I told her things about my life. Well I asked her to come to a friends party on Friday and she told me maybe, and that she has a rehersal. I pretty much took this as a no. Since then I've sent her a friendly hello text, but haven't gotten a response. 

I'm overall just frustrated, I don't know what I exactly I am doing wrong. Part of me thinks that she doesn't want to hang out with me because I smoke weed(something I've told her about) and she wants to be clean,but then again I have no clue. Does anyone has some advice?
<bot>: met girl in math class, hit it of great in person, she doesn't answer my texts/ offers to go out.