Here's what I will say ...
I totally get it. Been there. More times than I care to admit.
The key?
Don't run from the pain. Run right INTO it. Let yourself be completely miserable and upset and feel rejected and cry and scream it out.
The only way out is through. But if you supress it, it will keep coming up/you will keep calling UNTIL you deal with it OR it changes.
And it might never change. Or it might change for the worse. In fact, it's a much much higher chance that it will change for the worse - just seeing how people try to only marry one person. So EVERYONe else, you will NOT be with at the end.
So scream into a pillow. Yell in your car. Play sad songs and cry yourself out as much as you need.
The only way out is through.