I might want kids in the future but my partner doesn't - what should Ido?

A gay man writing into the advice column of the Boston Globe reflects a common problem faced by many of the clients I see. What do you do if you are in a relationship, don't know if you do want kids or might want them in the future but your boyfriends or husband has said they don't want children? Do you stay in the relationship or not?  

I might want a baby but my boyfriend doesn't want children.