If a girl says she doesnt like you but acts like she does?

After she said she dint like me I said"Ok,but are you mad at me cuz you havent talked to me in a while"and she said no and then she told me the boy she liked(I dont know him but she said 2 of my friends do).Then I asked them,they both said they didnt know him.I tought she is lying but that it didnt mean she liked me.She was always asking me for help in math/other cles and she sometimes touched me.Im always making jokes but she is the only one that asked for em.Between cles she would sometimes grab a book and say she would hit me and i said "You wouldnt dare" and shes hit me and laugh.She played with her hair while talking to me and put eraser of the pencil in her mouth and I sometimes caught her looking at me.We talked a lot both in person and in msn(we sat beside in all cles).One day she started to sing a reggeton song(were from p.r)and im a rocker but I started to sing too so it became "our song" and we sang it alot.We had this niknames "puss*e+name"(we were jk).