Justin's never there when Brian make his big statements of love/caring etc. Especially in Season 2. It's depressing.
Actually that might be the only time I really felt sorry for Brian in this whole arc. When they tell him Justin went to Vermont alone... god, that was heartbreaking, his face, the disappointment, the realisation - and then the big news were unimportant. That was such a sad moment. And YES, a horrible lack of communication. They drove me crazy with their misunderstandings and disability to just TALK with each other.