OK I like a girl from the other class and the point is that I have a subconcious "no" when I try to approach her and say what I feel and what I suggest(I will make little cocky and funny dialoge before the strike). please someone help me and if any girls read this to tell me how they will react I need an advice from the other side of the sex? And what will be the worst thing to happen...

(remember she doesn't have boyfriend)