Could someone please help, I'm inexperienced and need advice?

Youre 16. Past the terrible time that was 13-14 but not quite there yet. Believe me when I say that the combination of puberty and new life experiences is responsible for most of your anxiety over this girl. The brutal truth is there is nothing you can do about your inner feelings, but you CAN control your actions. Step back from yourself, look at the situation as a scientist would an experiment, decide on a course of action and follow through with it. Ignore the 'I love her soooo much!' and 'I want to bang her sooooo much!' thoughts which are undoubtedly plaguing our mind.