Broke up with my boyfriend (29m) over kids, now he changed his mind.

I (26f) broke up with my boyfriend (28m) of 4 years because he wanted kids. Over the last year and a half of our relationship I checked in with him constantly, asking him if he thought he could change his mind. He always said no. I moved to a different country and the day I left I asked him again, he still said no.
It's been 4 months since we've broken up, 2 weeks since I cut off contact since we were still literally talking every day and he said he changed his mind. That a life with me is more important than having kids and he wants to wait for me to come back (in 8 months) for us to try again. He said he'd been having doubts already because he doesn't think he'd be a good dad, says I'm the only person he wants and he doesn't want to be with anyone else because I'm real and I'm here so he'd rather choose me than some random person to have kids with. That he doesn't need kids to be happy. Even said that he'd get a vasectomy if I wanted him to.
I said no. I told him that I couldn't take that away from him and that I couldn't let him sacrifice something he's wanted for so long just for me. That I'm scared he'd wake up one day and change his mind and resent me for it forever.
Has anyone gone through something like this? Has anyone actually gotten back together and lived happily without kids after that's what their partner wanted? I want him back more than anything but I would feel so selfish even though he says he doesnt feel like he's losing out on anything.
I just don't know whether to even give him a chance in a few months. I told him not to wait for me and to live his life and move on but I'm regretting it so much right now. Does anyone have any insight?
Tl;dr: broke up over kids because I don't want them. He's not interested in moving on and told me he doesn't want kids anymore. I don't think that's a good idea.


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