I did this to a few girls and whatever, it's just dating. Move on and find someone else man, don't give up.

She thought you were cute. You went on date 1, she thought you were decent enough but still wasn't sure about compatibility. She went out with you again, but still wasn't on the same page as you compatibility wise. She should have told you she wasn't feeling it, but she's being a coward.
At the end of the day, you've probably saved yourself some grief. Don't give up, some day it will all click into place.

Maybe you need to source out some women to date...instead of girls? Rock on and take all that frustration, let it out, and then gather steam. Natty's right. xo

does not a relationship make. Try not to get too invested until there's been more time together. (I get emotionally involved way too soon and am trying to break that pattern.)

Very guy-like behaviour...sucks, eh?

Lots of girls feel pressured to have sex the 3rd time. My guess is she wasn't feeling it.