That's good that you two did some talking and airing out of these concerns you have. Doesn't sound like much of anything is resolved though.

He says he needs lots of time alone. I think he really needs to not be living with a girlfriend. He's not ready for that level of commitment. Moving in with you meant he had to switch to a lower paying job? So he made himself more financially insecure, so that he could have the security of living with you. As I said above, he sounds like a guy who would rather be taken care of, than take care of himself. Then he amuses himself with all kinds of on-line game playing. I really do think you've adopted a kid, rather than having found yourself a partner.

A year and a half of dating before moving in together was a respectable amount of time to have gotten to know something about one and other. Still, I think you would have done better to have just kept dating. It doesn't sound like he is mature enough to want this much commitment. Unfortunately, living with you may actually pose a roadblock in the way of his journey toward greater maturity.

It doesn't sound like the two of you are all that good for each other. You'll probably feel better for a little while, as a result of the talk the two of you had, and, then, you'll go right back to where you were at the beginning of this thread. That's not a very satisfying way to live.