He doesn't want kids and I do!!!

I am in this situation right now My bi clock is ticking and I am older than my BF and he has one kid with his ex. He has stated he doesn't want another child because its too hard to raise the child he has. He has had some issues with his child's behavior and he also seems to think that his child should be good enough for me to have. Some other womens child he had with is just not the same thing as having a child of your own with the guy you love. His child doesn't even live with him so I don't see him often. I have no part in raising this child and he sure doesn't respect me as a mom. I do what I can when I actually see him and I try to be his friend, but that is all I can do. Why wouldn't the man you love want to have a child with you? He loves me and I love him, its getting worse and I'm starting to resent him for trying to make me miss out on motherhood. I'm slowly becoming more distant from him and I'm wondering how hard its going to be to get back out there at my age and try and find someone again not to mention marriage and children and there still is no guarantee i will find anybody. It sucks and im depressed as hell!!!