He's obviously just as scared as you of things going wrong, and maybe he doesn't have anyone but you to talk about it to, (men generally don't talk about their feelings they cover over them).
If he says if it happens it happens, then he probably does want one but is thinking of the hurt from last time. He loves you so wouldn't want you to hurt like that again.
Talk to him share your fears, or just don't share your planning and let him think you get pregnant by chance.
Obviously I don't have experience in your situation so it is easy for me to sit and say, but you will know what to do.
good luck hun, it will all work out
