Girl truble?

i really like this girl and we are like best friends and i really like her and i like her so much but shes goin out with this one guy and i feel so bad...neither of us can drive yet and that suks becuz every time i try to make a move theres a whole bunch of her friends around talking to her and i wanna be somewhere alone with her when i make a move. how can i even know if she likes me back????