"Let's have sex"? Well, she certainly went straight for it.
Hmm, so he did confess to her, but in a way she turned him down? Then after she left, she found out how much she actually did like him. A simple enough story, but I still like it. Also, seriously considering sex with him is one thing, but I think he'd actually much rather hear that she gave serious thought to going out with him. I suppose they mean pretty much the same thing though.