Pretty long thread...but I think everyone missed the real point. Have you kissed her at the end of the first date, ie. after coffee?
You know, you walk her back to her car, then usually she stand outside waiting for you to make the move, at which point this is where you move in and give her a goodbye kiss. This is where you seal the deal, and it makes all the difference between her blowing you off like you described, or going out with you again. Because at this point, she really is uncertain about how serious you are, because words are just words, actions speak much more than words alone.
If you didn't kiss her, well this is now where it gets tough, because you have to get it in, but to do that, you need to meet her again. You can try and try, maybe she will go out once more with you again, but who knows, chances are real slim.
You don't have to believe me, but I have seen the difference it makes. Best of luck.