I Need some advice about asking a girl out?

Practice in front of a mirror. Be indifferent towards her (don't treat her like she's the queen of England), flirt with her, touch her, make her laugh, be sarcastic with her, never answer her questions directly unless the answer is no (for some reason girls go crazy for this). Oh and a really good one; tell her she smells really good when she's close to you (whisper it in her ear). You'll get her man, hang in there!