Hi, I'm in same situation, except my husband eventually wants a baby just not now. I am just going to be honest with him and ask him not to say anything until I am finished talking. I will tell him that I know he needs time to digest what I am saying and that I do want to hear what he feels after he has had a chance to think it through.
I know he will eventually come around as I'm sure yours will too. You both will love your baby.