Gosh, I don't know. I try to be more resilient now, I've dealt with it poorly in the past. I guess try to think positively about it somehow. I don't know if you've ever heard the saying, "As one door closes another one will soon open." ~Or something like that, I think I'm saying it wrong. Sorry if that sounds cheesy. Also, you could look at it as it being that persons loss, not yours- they don't know what they're missing!
Sending much and your way.