Do shy girls sometimes avoid their crushes?

Okay so a few days ago me and my crush where talking about crushes. I wAs guessing hers and she would give me hints and stuff so for like two hours it was all good her hints where like pretty much saying it was me I was So happy. Then she went to the bathroom and when she got back we continued the game. But it was weird because the hints started to lead to another guy and after another hour I said I had to go and she is like okay bye then she is like wait before you go can you ask me one more question I'm having fun so we played for at lest another hour but it turned out her crush was another guy… But she said very… Strangly then I said well my crush was you and she said aw sorry then we talked a litte more then we left now ever then she is avoiding me like today I logged on FB and like ten seconds after I logged on she logged off… Does she like me or… And she treatssm different then other guys and she flirts with me a lot but ya we're both 15 and she is VERY shy. Sorry for the long text and bad grammar I'm on my iPhone >.<

You are i'm guessing the first guy to like her, she doesn't know what to do, what to say to you, she is shy, so am i and i did that thing with the signing off before too because i didn't know what to say to him i didn't want to have things get all weird so i just signed off, but yea she likes you for sure, if you don't see her looking at any other guy in the class and she only avoids you then yeah she likes you, and daa! She is not going to tell you that it is you she likes in front of you, she is shy, i wouldn't, anyway good luck, and if you want to brake the "ice" or "oddness" try bumping into her or making a joke in class, or saying bye to her when class is over or good morning when the day starts, or joke and make her laugh, good luck.