I am the dumper and I deeply regret it.
Ended it with my wife because I didn't want children. It was a torturous decision after months of contemplating I just decided I would be resentful as a father. I still loved her, but after finally ending it it felt like a relief that we could both move on with our lives in the way we wanted.
Well a year later after some major personal upheavals my views have changed, unfortunately way too late. Not that I want children per say, but I cannot stand being without her. I would enthusiastically have children with her if it meant I could be with her.
Now she is with someone else. I know nothing about their relationship but it is absolutely killing me. I wasn't a perfect partner and have some things I would need to work on, but now I'll never get the chance.