WTF? After doing something like that, she probably thinks you just wanted to get in her pants for a one night stand. If you really want to get together with her for any kind of relationship, you need to tell her that you're serious about her. She probably won't believe you after doing something like that. Girls are sensitive about sex and everything surrounding it.

What I'd do in your situation is send her a bouquet of roses with a note attatched stating how embarrassed you are at your prior behavior and how you honestly care for her and want to see her again. Ask her to call you, because you feel you need her to forgive you for your actions. You might look a little dependent and/or clingy, but it at least lets her see your feelings and keeps you from having to ackwardly visit her in person and explain yourself. If you're able to actually go see her, that might be better than a letter, though...

Show some guts and let her know what a wimp you were!!