Why hasn't she talked to me?

[your little angel]

So I left this girl an anonymous message on this one website (I'm also female, to eliminate confusion). It was nice, of course, and now she really wants to know who I am. She said that she really wants to be my friend & that we could probably become good friends because I'm so sweet. I would have had no problems with this, if I wasn't so shy and not confident. I've always thought that she was really pretty & even envied her. I didn't tell her it was me yet. We have done some back & forth and she said that she promises that she doesn't think of me as a creep (and that she doesn't break promises), she wouldn't reject me, and that it doesn't matter if she's a grade ahead of me (I told her what grade I was in). We have band together. And she said that she isn't good with meeting new people too, so I was like "wouldn't it just be plain uncomfortable then?" And she's like "Yeah well, once we get past that we'll have a good friendship or something like that." She said that I should just tell her because she doesn't like waiting. I told her on the internet on Wednesday and she says: "I do know who you are, I told you. And tomorrow I'll most likely attempt to awkwardly talk to you." She didn't talk to me at all, just looked at me a few times when she was in the lunch line. I'm getting a bit worried. Then, last night we had a band concert last night, nothing. Today, nothing. And break starts for us, so the next time I'll see her will be in January. Do you think I should worry yet? Or give her a little more time? Or do you think that she just said that to get an answer out of me? One more question, should I ask her online if she really does know who I am?