Thanks to both of you for your replies!
I know that I need to let him know what I want/need, but I guess finding the right way to say it is the more difficult part of it all for me. As you may have guessed from my original post, I have a tendency towards being overly verbose, and I don't want to muddle things up through an over-complication of words!
IZ - It's not that I doubt his attraction towards me. In fact, I feel absolutely confident in that realm of things. It's more of a doubt about how he feels towards me on an emotional level, because of his responses to various things.
I'm not at all certain that he is an ISTJ...just an educated guess, but I could definitely be wrong in it. I'd love to get him to take MB one of these days, so that I know for sure, as I think understanding personalities can be a huge help in working through obstacles in a relationship. Tips for convincing him to take the test??
As for age, I'm 31, and he's 27, which I think plays its own role in things in that I've had several "serious" relationships, and I'm not certain that he's even had one. He'd been in the military up until 1.5 years ago (the same amount of time since he'd dated anyone) since he was 19. Even though I've had serious relationships in the past, no one I've dated has shown so little exterior emotion, so it's a change for me.
I guess through it all, I'm also trying to bear in mind that it's only been about 6 weeks, and maybe I just need to be patient and let things happen as they will. Most of the time, I'm okay with where things are at, but occassionally, a sort of angst appears due to his lack of reassurance that he's "into me."