HELP - Need advice. I want kids, he doesn't

Meg • 🍍
Hi ladies. 
So here's my issue. I am in love, ready to say yes to the man of my dreams. He has three kids, I have had 4 miscarriages with my now ex husband and no living children. 
He knows how important it is for me to have kids, how it's the only thing I want. And now I'm realizing that he has decided that he doesn't want any more. 
I don't know what to do. I want a family. I want him. And I know I can't have both. It's a matter of what I want more, and I don't know what that is. 
Before I walk away from him (and the best happiness I have ever known), I am wanted to know if any other ladies have been in this situation and how it had worked out. Did he give in? Did you give in? How did it work out?
Thanks in advance.