TTC.. Relationship probs...

So... I only have 1 ovary due to having a tumor previously wrapped around my other ovary and Fallopian tube and according to the docs, once I reach the age of 20 it's a slimmer chance of getting pregnant. 
My boyfriend and I have been dating for almost 2 years now, I then finally asked him about having a baby with me due to my conditions. At first he was hesitant then he agreed and then backed out of it because " he talked to a few people and we all think it's not just a great idea right now because I still want to live my life and not pay you my whole life " yada yada even though after the fact that Ive told him a million times that I wouldn't make him pay child support if we had happened to ever split up an etc.  
How can I persuade him into having a baby with me right now...