MMm how many hours have you got?
You need to practice, talking to strangers, holding eye contact, smiling, being friendly.
REad the stuff on this sites, but really try to get as much practice withs strangers and girls. and don't think of her as the be all end all, change your mindset, she's a girl what could potentually go out with YOU, not you with her, its you, and she could go oout with YOU. Your the guy, manly,. confident, she comes to you, you act despitre her words and decisions. Relax, deep breathes.
I'm not the best at this yet, but i thought i try my best