Ladies i need your advice please?

theres this girl i like and havent really got to know, but i think she likes me back for the following reasons uring the first four or five months from september to about january she seemed ok just starting a few small convos, but i never took it further and got to really know her, ive also caught her looking at me a lot out of the corner of her eye when she leans forward in class or just sits back in her chair.During the last month she's also felt up my lower leg with her foot several times for periods of 5-30 seconds, i dont know if its an accident though because shes done it several times, but once she said sorry when she was doing it and i looked up at her with a serious face.She also seems to be walking in the same place as me when im off somewhere sometimes, and she gives me a wide genuine smiles to her eyes, and sometimes in the common room she says something as a joke to me such as "are you going to be late today to class" and gives a genuine smile, and she sometimesgigglse when i get in trouble.However, sometimes when i look at her she avoids eye contact, and once she started laughing and when someone asked whats funny she said that im such a freak in a half joking manner, ALSO last week i handed her a sheet in class and she looked at other guys and started giggling and went all red, and since then whenever she says something to me in class or finds a small excuse to talk to me such as "you got the sign wrong there" she can never look me in the eye and she always blushes. However, i flipped on her last week and abused her infront of everyone so i sent her a message on facebook and apologised to which she replied "No probs. And I've heard no rumours about u :S ALSO TODAY SHE MOVED AWAY FROM ME IN CLASS, SHE SITS NEXT TO ME, BUT TODAY SHE SAT AWAY FROM ME NEXT TO HER FRIEND.