Honestly, you will both be happier later in life if you move on and find other people who share your child rearing preference.
Please, listen to this. You're looking at, if you stay together with him, a long, long road of resentment. I've known far too many people miserable from a choice like this to want to let anyone else mess up like that. Resentment isn't actually a bad scenario, either. It's one of the better ones. An average scenario, you'll break up, or he'll cheat on you to have children. It sounds like it would never happen, but it does.
Trust me, it is for the best that you've broken up.