Best thing to do is take some lesson away from it.

Fact! She is not interested.
Disect all the times you wrote something and said you shouldn't have said that. Look at the number of messages you sent and the frequency. I don't know what to look for exactly brother but this approach didn't work. Refine yourself so the next one will work better. So you will feel more confident.

Look she was there, it was great, it WILL happen again with someone else. Collect your thoughts, take away what you can and then move on to someone else who is a better match.