There is nothing personal about rejection. It happens to everyone. It is
part of "the cost of doing business". It is intimately connected with
risk taking. Every worthwhile endeavor at some point involves the
risk of failure. This is what makes life interesting.
It is only by risking our persons from one hour to another that we live
at all. And often enough our faith beforehand in an uncertified result
is the only thing that makes the result come true.
There are techniques that can remove some of the sting from the fear of rejection. Simply "scoping the situation out", proceeding in small steps, rather than taking the grand plunge all at once is a prudent method of risk management. Asking a woman you have just met to become intimately involved with you is an enterprise almost certain to fail. Asking her to share five minutes over a cup of coffee is a more modest proposal, one much more likely to meet with her approval (after that, she may hint, or even let you know outright if she is willing to go farther). Tackle tricky situations in small increments.
When you do face rejection, and you will, accept it with good cheer.
Bounce back and try again (presumably with a different woman).
Continued life experience will desensitize you to the trauma of having
doors slammed in your face. You learn to survive. You learn to go on.
You learn to keep trying.
Since everything in life is but an experience perfect in being what it
is, having nothing to do with good or bad, acceptance or rejection, one
may well burst out in laughter.