Do girls deny their feelings sometimes?

I mean really, this girl gave me strong signals that she liked me, talked a lot, smiled at me, strong eye contact and as soon as I asked her number so we could talk without having to see each other at school, she gave me some lame excuse and started acting weird. I asked her what was wrong and she said "nothing" (but of course something was wrong since the talking,eye contact and smiles stopped, except for some forced smiles) and its not like I asked her out, I thought we were friends and friends do talk outside school, but whatever. After that I stopped talking to her, just saying hi once in a while, she started talking to me again and the long conversation, the smiles, staring, eye contact, constant teasing and silly arguments started once again, but now we have a hot/cold thing going. I feel like she likes me, the way she looks at me, the way she smiles and shyly looks down, the way she treats me differently from everybody else (she tends to be a sarcastic smartass and playfully mean towards me) the way she walks away and looks back and gives me this big smile. Am I misreading something? do girls have a reason to hide their feelings? I don't feel this way with any other of my female friends, its like when we are together, there's something in the air, and people notice it, any thoughts? and no, I'm not interested in being friends with somebody I'm attracted to and we are not friends, technically, since we only see each other at school but for "just classmates" we get along extremely well and she doesn't call me "buddy" like she does with her male friends.
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haha, why do you deny them? Its so obvious, she is stubborn, bossy and tries too hard to act like she doesn't like me that comes out the opposite, she criticizes all the things I like and yet she tells people that I'm very smart,isn't that a contradiction
Do girls deny their feelings sometimes?
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