Hello S2S .....
I know you've had your discussion about no more kids. It could be something very important to him ... and while it does sound kind of childish to make a list of things he doesn't like about you or your joint situation, you might want to take the list seriously.
While you have recognized that you have some problems mental and physical .... he may have some problems himself that he has not faced yet. It seems like a very good time to seek a couples counselor .... and if you're in a large metro area, you might be surprised to find available some counselors who workon a sliding scale.
I believe meeting many times with a couples counselor will at least bring out things that one of you are not aware of .... and possibly more. I went thru that excercise about 6-years ago while in the middle or toward the end of a 7-year relationship.
By the 4th or 5th session, I found out some things about my partner that I didn't like at all ... and were well hidden by her. In time, it lead to us breaking up .... but, as I think Carl said earlier, better to know now than 10-years from now. And that's not even mentioning about all of the complications that could be created for your son.
I really do hope that everything works well for you both ... but test it! And a couples counselor sounds like a great way to do that!
Best wishes to you.
Rob and Gizzy