*Swoops in from the heavens as lightning crashes*
Ahh, gotta love a dramatic entrance whenever someone mentions my name!
Seriously though, I'm curious why you feel that she no longer desires to be in a relationship with you. You said that you felt like you blew it just to get between her legs. Did you do something in order to make her think you only wanted sex and nothing more? If you didn't, then it's possible that she's still quite open to the possibility and all you have to do is show some interest.
By showing a lack of interest, you are sending the wrong signals, you need to initiate contact and work on creating that strong connection. As long as you don't do this in a needy and supplicating manner, then there's no reason she would lose interest. If you keep showing that you don't want to engage her, then she's going to assume that you're not interested. See how you're kinda going about this backwards?