Hiya Pandora's Box...
It wasn't too long ago that I was in shoes similar to yours-- from a Top's perspective. I was into someone who really won me over, and looking forward to years of love and play with her. She just turned tail and ran.
Abandonment really screws with my head. I went through various grumpy stages. Then, she came back... and then left again, just as easily, and I just laughed and sang a lot of Rollins Band for a day or two. "Ah-Hah-HAH! Oh, HOH! SUCKER! SUCKER! SUCKER!"
I was messed up for a couple of months, grumpy and lonely, and resisting affection from several new women. And then in a moment of clarity, I opened up to one of them with complete trust, confidence in myself, and... optimism, hope? Something inside me that has been wounded for a long time functioned, and I guess I made an pretty unexpected connection with someone who fulfills me.
The missteps are awful, there's no denying that, but if nothing is risked, nothing is gained. Trust your instincts and be brave about insecurities. Don't settle for what's at hand, but don't dismiss what's at hand without considering it.
My story isn't your story, and you have your own life to live, but I believe that you'll find the situation you're meant for when the time is right.