I can't tell if he's into me

I've been with this guy for 8+ months and things are going well until I start sensing something wrong such as when he's acting distant and ignores the fact that he is. That's the main one but he is like that as a person already; aloof, closed-off, distant, etc. When he's with me and everythings okay, he's funny and open and comfortable being himself. But randomly he closes off which is something common for guys to do when they need space all of a sudden cause of some stress or in terms of their job. I don't mind giving him his space but not for too long cause then he'll lose interest or it is because he's losing interest but doesn't want to say. So besides acting distant, he also doesn't encourage me as much as he should supposedly. I personally don't mind how much he does, I thought it was fine whenever he did but apparently he needs to be this constant cheerleader. So just cause he doesn't as much as he should, is he not into me? even tho I don't mind he doesn't do it ALL the time? And the final, drum roll...he hasn't put an official title to our "thing?" We act like a couple, he tells people that hes seeing me so hes not hiding me or anything but he doesn't want to say he is in a relationship for some weird reason. I believe he wants best of both worlds...not to be with other girls but to avoid the drama/responsibility that comes in a relationship. I think this is his way of keeping it ass stress-free so I don't think I should take it personal.
He's a really stress-free guy like he's 100% NOT interested in drama, avoids serious conversation by joking around (which is something we have in common but as a girl, my emotions sometimes take over)...basically carefree unless it has to do with his career. He has brought me around his family a few times already, he is loyal (hasn't had sex with anyone, he has OCD and is a clean freak so he's really careful about who he has sex with, and he's usually with me, his roommate, or at work), he does contact me first if he doesn't hear anything from me, he does treat me, he hasn't told me I need to change something of myself except something I could do better at like my manners, attitude, etc. So is he into me? I feel like he is despite the whole "not wanting to call it a relationship exclusively" even though according to the basic rules, that means he's not into me. Can't two people be together and into each other without taking it too seriously? I think thats the route we want to take.