It all depends on his intentions in telling you this. Did he do it as a way to break up with you or as a way to dodge any pressure he feels? Or was he just being upfront with you that he doesn't want more kids? If the latter, it's up to you whether you can deal with this or not. If the former, maybe ask him if it's just about that or if there's some other reason he's not into it.

If he said he doesn't want more kids then you should take it at face value. He either doesn't want more kids, or doesn't want more kids with *you*. If the latter, you need to withdraw and take care of yourself some more because he's not appreciating you as he should. You miss him but it's more important for him to miss *you*. So make him.