He doesn't want kids....

What do you do when you've been with someone for 3 years who is "the one" and you've told him from day 1 that you want kids and he knows that and you have had many conversations about it. Then suddenly mid argument he screams I don't want fucking kids anyway... i have wanted children since i was a child and so this broke my heart. And i couldn't live my life without having children.

What would you do?