Birdgirl, you, like many others, have linked casual sex to low self-esteem, which simply isn't always the case. It's a double standard, really; if a guy has casual sex it's fine and he's on top of the world, but if a girl does she thinks of herself as shit, right?

Jimbob, I also know how you feel. The difference is, my dream girl had no further interest in me outside of friendship. Consider yourself lucky. I know this really sucks right now, though, and you should probably have a conversation with her about this if you're close.