Getting rejected in life.?

Get more active, go join some sports clubs or ociations, find something that you are interested in doing, just get going, and soon you will get into momentum, knowing many people in the process. The world is very big, those people who rejected you in the past and now, are only a very tiny portion of the population. Do something and get yourself involved in activities, don't hide in corner to brood over small problems, and you will be fine.