Does this girl like me?

Ok, I really like this girl in my cl and believe shes interested in me. Alright this past week I had asked her for her number and she gave it to me, she then asked me for mine (don't know if this means anything) and so since then I have been talking to her... But this week when I was talking to her I had asked her to come sit next to me.. she did and when we started talking to me she would twirl her hair. Today at lunch she sat next to me as she always does and we talked once more. I do want to mention that when we talk its a quick conversation and then its dead.. Today our conversation was actually more complex. I do notice that she tends to look at me and then turns away quickly when i look at her as if she is too shy to look at me directly. I would also like to add that she is shy.One more thing she waves at me and says hi everytime i see her. And another thing... today we had gotten our sheets for next semister and she asked if she could see it(looking to see if we had any cles together i think). Can anyone tell me if she likes me? Where I am at? What I should do? Any suggestions at all?