Should I be worried that this guy hasn't made things official yet?

So I met this guy in really early November at a party. We're both college juniors, him at a military school and me at a regular college. He was at this party because he was visiting a friend who goes to my school. Long story short we really hit it off, kissed, exchanged numbers, and since then we've talked every day and see eachother almost every weekend as time/our schedules permit.

He's met my family and friends, he invited me to meet his (haven't made it to his house yet though), he's stayed at my house, his entire family knows about me/us, etc. We've taken some trips together as well (he has to travel a lot because he's on a sports team at school) and they've been fun. At this point I do really like him and would want to see things be official with us.

But they're not. And he hasn't made any verbal indication that they will be. No talk about feelings, nothing. He obviously flirts a lot with me, we do everything a couple does, except we just don't have that official status. Which, at this point, is kinda freaking me out- wouldn't he know if he liked me enough to date me at this point? I'm scared of being let on or used.

For some reason I'm afraid to bring this up with him as last time I did (a few months ago, more towards the beginning), he kinda just brushed it off.

Is this concerning? What am I supposed to do at this point when we're doing everything a couple does except we aren't? I don't want to get too attached only for things to just fizzle out. I don't even know how to answer when people ask if he's my boyfriend.