I was rejected, what do I do?

I friend requested a guy on Facebook whom I WAS interested in, and said that would be the indicator if I should go further, but he rejected me, and I really don't know what to do, other than the stupid answer of 'move on.' I know 'moving on' is best, and I will, but I basically was stood up, and I feel really hurt and degraded, because now I know how a lot of people feel about me at school, and that I'm just another person. How do I deal with this? Yes, I've dealt with rejection before, but not in a healthy way.