I think GP is more "in control" than "controlling."
I'm going to take your word for it... you're just getting to know him, and I am learning of him through what you decide to share, and even THAT is through your filter... I'd hardly garner that as a basis for me to say "I think he is controlling."
I think your very best strategy with this guy is to be completely, 100% honest. Or at least as much as you can (sometimes you can't be honest with someone if you don't yet know yourself, kwis?) So when he says stuff like
"Do you think that you'll ever trust a man enough to get married again?"
and you don't quite what to make of that... say it. Or tell him... "I don't know yet. I'd like to think I will... I'm still healing..." or whatever your truth is.
This guy is putting you through your paces... not in a bad way... it's kind of a "I'm going => THIS => way. Keep up. Or not. Either way is fine with me."
No pressure on you. No pressure on him... and you get to have some fun while you do it.
But IF he gets controlling somewhere in there... it's my Corri vote to dump him.