Try to push out of the friend zone in anyway you can, because once your there its hard to get out
Advice
#1). Invite her to your house after school, She obviously wants to know you better before she tries anything and gets hurt, girls are fragile, be as sweet as possible, even if your a total dick, be nice to her. This works trust me it worked for me, and at that time she had a bf, and now, well I'm her bf lol.
Thanks,
Joker