Babe, you aren't the same person. There is a reason for his behavior, and you haven't been through what he has. And you may never go through it, his world is different than ours.
It's not something that has to be done right now, but I just wondered if you've thought about us getting married. I of course want to but I also know that you might not be ready. So this is more just wanting to know if you'd be willing to at some point.