Let me explain this - he isn't ready to have a child when he's not married. He may NEVER be ready to have a child whether he's married or not. If YOU want a child, I'd find another boyfriend/fiance. I suspect that if your birth control fails he is going to walk away, and you are going to raise the child by yourself.
I married a man who was (likewise) wishy washy about children. He spent a lot of his free time pointing out pregnant women, how shapeless they were, how men lose their sex drive when their partner is pregnant, how women never regain their figures. I got the picture. He didn't want children.
I divorced him, because I did want children. I wish he had been more honest from the beginning.