From a girl's point of view, I can tell you not to worry too much about that. If this girl is really into to you, then she shouldn't be mad or annoyed or anything that you didn't kiss her. If I were in that situation, I'd think it was cute and all, how the guy was flirting with me and stuff, and wouldn't be disappointed that he didn't try to kiss me. I kinda like to wonder, "hmmm, what'll happen next time I see him?" in a cute, excited way.
I don't know what kinda of girl she is, but I'm the kind of girl that takes things just a lil' slow, so she might not necessarily thinkin the same way as me. But if she wanted that kiss bad enough, she should have gone for it herself.
Like Bonovox said, next time you see her, wait for the right moment, and give her that kiss
"The greatest thing you'll ever learn is just to love and be loved in return"
-Moulin Rouge