If you told your husband your desire for a child was so great that you were considering leaving him, what would he do? Would he compromise, or let you leave?
If the latter, then I think you should do it, and leave him. I am not saying he is categorically wrong for not wanting a child - of course I can't say this, everyone is entitled to make this choice - but I wouldn't stay with a man who would deny me something so important (and something he already has himself).
Therefore, I think the choice is easy. Tell him you want a child, and if he says "well, sadly we'd better split up then", then you better had.....
My ex- husband didn't want me to have DD. Though she was a planned child, he changed his mind when I became pregnant, and asked me to have an abortion. I didn't. As it happens, we aren't together anymore (though we didn't split till she was 5, and that was due to his cheating, not my persisting with the pregnancy) but he is an excellent father who loves his daughter very much. But I wasn't willing to pick him and his happiness over the chance to have a child of my own. And I don't think anybody should, really.
Sorry, I am not sure I have expressed myself all that well here - I hope that what I have written makes sense?
Good luck, whatever you decide.....