First you might wanna think about what you want, NCC.
Does she make you horny and do you just wanna screw her? Nothing wrong with that, just be honest to yourself (and her).
Or is she a great person, do you have common interests, a basis for a relationship? A fairly important question, I personally couldn't imagine to be together with a seventeen year old. Too immature.
Then you might tell her what you want and ask her what she wants. Might be more productive than talking with other persons about a matter which is entirely between you and her.