To me this is the ENTP curse. We feel confident with people when we wear our mask. The mask of ease, enthusiasm, and charm. When we fall in love, it's like getting hit with burrowing bullets that penetrate the shiny armor. We become completely unmanned and powerless. We want to protect ourselves, but we know that to love and be loved we must reveal ourselves like little soft hermit crabs venturing from their shells to meet with another.
I've thought about this a lot on my own journey and I think the answer is to embrace rejection, embrace hurt. Don't run from it or fear it. The only protection from the fear is to be boldly naked and vulnerable.
You cannot stop someone from rejecting you. So, best not to worry about it. If someone rejects you they don't love you. So in a way, they do you a favor by allowing you to move forward.
Good luck to you. You have nothing to fear and everything to gain.