I have been there and done that. It is painful, can even feel like a death (it kind of is – the death of a relationship, the death of the potential for a life with the other person). No one can tell you, “It’s for the best. It wasn’t bashert. Better now than later…” All those things are TRUE, but it is hard for you to hear that right now. The only thing that will help you is time, distance, and a new relationship with the person with whom you are truly meant to be.
I feel tremendous empathy for you right now. It was very hard for me to get over my broken relationship, which was just short of engagement. Thinking of it what I went through then, STILL causes a momentary twinge. And that was something that happened 40 years ago. But had I not gone through that pain, I would not have grown from it, and would not have been ready for the relationship that was ultimately meant for me.
I am married almost 35 years to a wonderful man, very different in many ways from the other guy. And I thank Hashem for that. because after all these decades, I can appreciate how lucky I am. I hope you meet the right person for you very soon. But even mroe than that – I hope you will keep your mind and heart open, so that when you DO meet him, you won’t be afraid of jumping into the water again.