well girls love it when you tell them nice things, but don't ask any questions that could make her feel uncomfortable! ask things like what are your hobbies fav. color things like that then maybe when you get further in the relationship then you can ask more serious questions.
Ask her what type of music she's into, or what bands she likes, ask her what kind of food she likes, and things like that. You have to be creative, and remember to be appropriate. If you are that nervous, try practicing at home what you are going to say to her.
Take it from a girl. if she likes you suck up courage and go talk to her. Get to know her. Ask her questions. then ask her if she wants to go out. answer her questions to. and don't lie. most girl can tell. and if they cant they will find out sometime.