Well ask ur self is that how she acts to every one or what. In her eyes she might just being nice. Does she always look at you. Ever text u hey, wud, or even miss u? Multiple times during the day if so she's hitting on u or wants some1 to talk 2.
Or you can ask her out on a date type thing... Ask her out for coffee or juice something simple like that which would not have so much "pressure" attached. She could like you but doesn't know how to tell you. Unfortunately, I have learned that if you don't ask a question the answer will always be no. Good luck!