Girls, why is she acting like this?

There is this girl that i am good friends with. Well she and i are in a class together. She sits next to me and every few minutes she will run her fingers through her hair, fiddle with her pen or paper, touch her face, or put her hands in her lap and like rub them. We our teacher says something funny she looks over at me, laughs, and sometimes says something about it. She never really talks to me though. We hung out b4 school started and we talked alot, but since school started she wont talk to me. She talks to all of her friends and my friends, but never says a word to me. She will sometimes say hi to me in the hall or she will say something about me while i am in the room and laugh about it. When she sits with her legs crossed she has her foot pointing towards me. When we go to conferences and etc. she usually sits next to me

She didnt act this way this summer. She and i spent most of it together and she was more outgoing. She flirted with me alot too, but i was afraid to tell her how i felt cuz she had just gotten out of a relationship. when school started is when she started acting this way. Her ex came crawling back to her and sucked up to her and everything, but she still acts the same way. We had a bonfire one night and she left him to come talk to me about one thing we did this summer. everytime she is with him like at a ball game i catch her looking at me or over in my direction. She has always acted this way around me eventhough we are really good friends. This summer is when we really talked to each other alot and she flirted with me alot. She even held my hand, touched my upper thigh and my chest, but i was afraid to tell her how i felt cuz she had just gotten out of a long relationship. Does she like me, and if so why is she acting this way?

she likes you. She doesn't know if you like her.
She is not sure how to tell you maybe. it's interesting how these same ambiguities even continue in adulthood.
Anyway. Tell her you like her, but not around friends.
.. and not during school.

she prob likes you but maybe you should talk to her instead

sounds like she has feelings for you and is too shy to do anything....go up and if you have feelings for her tell her if not dont worry about it if you dont respond differently she will ggive up or ask you out....if it bother you then ask her if she says no then idk i wouldnt worry about it:)