OP please don't take offence, people ARE being agitated because it's clear as a bell what's happening here and you sound so, so wide-eyed and naive about it - and you're clearly smart and articulate so people are thinking WTF why can't she see the obvious.
This is it:
So men really see marriage as more of a commitment than having a baby with their partner?
-Yes! Yes, because if you have a baby together he can simply walk away. He would probably get away without even paying maintenance if he put his mind to it. If you're married... you get a claim on his money, and his house, and his pension. Oh ho ho - very, very different.
I wish he would be clear with me.
- Being clear would be this. 'I'm fine with having a baby because you would do most if not all of the actual caring, you'll be the one taking the hit with your earning power, I'll get a baby out of it but I can walk away if I want and leave you to it and not much risk. But if I marry you then you'd have some rights - to my house, to my cash. I'm not committed to you enough for that. I'm in this for me, not for us.'
You think he's going to say that?!
he has a house and I am helping him pay the mortgage....yes I know not good.
(head in hands) - no, not good. He knows exactly what he's doing here OP, and it's very, very hard-nosed. He's making 100% sure he's taking from you and putting all the risks on you but keeping his investment safe.
These are the red flags, not his family.
He is not a good egg.
If you want a baby because you're not getting any younger - that's actually a slightly different situation. You could just go for it, if you know he's generally kind (if totally ruthless and willing to shaft you!) and healthy, and this way is easier than sperm donation in many ways. But be really clear on knowing that this guy does NOT want to commit to you and does not see you two as a team and he is protecting his interests over yours and making sure you are left very vulnerable. So you'd be doing it 'alone' in a very very important sense. One thing is essential: give your baby your surname, if you do get pregnant in this situation! Baby gets your name. If it ain't a married name, it's going to be your maiden one 
But start protecting yourself. Are those mortgage help payments referenced, for example? Do that first. If you have money going out every month to his account from yours, label it 'mortgage payment'. May help you make a claim later if you split. Note, he probably won't like it at all if you do, which might give a bit more clarity.