He knows that which is I suspect why he is not giving you them.
The thing is, that says enough, to me. You cannot start a marriage with this sort of stonewalling as a foundation.
You're exactly right in your description of the situation. You're behaving like an adult; he is not. You are doing all the work. You still have very little information to go on.
I think that indicates that a marriage would not be your best option with this man. Certainly not unless he makes a dramatic change in his behaviour, very quickly. Otherwise it is pretty much doomed I think.
Yes, you have a baby on the way but it looks very much as though you will have to make the decision about keeping the baby or not without any help or guidance from him. He's simply not going to help you with that decision. He will not step up. (and I know where you are coming from, having been in your position).
So, your options are to keep the baby and marry him (not going to work - well, very unlikely to because he's not a grown up in the crucial areas);
don't marry him, and keep the baby. Difficult and will involve him for some time to come but at least you won't be married.
Don't marry him and terminate - dreadfully hard and very sad but you will be free of all involvement with the man.
I think you may need a spreadsheet to make a decision, because I would. Fwiw I left the bloke and kept the child, and it's worked out Ok.
You would always have the option of seeing how it goes with him, if you continue with the pregnancy and he doesn't sound horrible enough to make your life hell through child contact, so that may or may not be your best option at the moment depending on how you look at it.
But please don't wait for him to help you decide because that's not going to happen.
Sorry you are where you are. x