If I was in that situation, I would probably feel that he´s too difficult to communicate with, and I would get tired of the whole thing/turned off. If something isn´t working out on its own, I believe u shouldn´t try to force it or fix it.
And the fact that you´re living together makes it even more complicated.
I once shared an appartment with 2 guys, and of them was always being very shy and nervous around me, which made me feel nervous and awkward too. Whenever I would get a visit from a friend or boyfriend, the nervous roommate suddenly seemed angry and jealous. So I figured he probably "liked me" or whatever.
Anyway I just think those situations are so awkward, when the communication isn´t going smoothly.