You don't truly know anyone until you've lived with them. That's the truth.
First year in college roomed up with two high school buddies. I mean, we hung out everyday our crew was large, we were the only ones to go to college.
By the end of the first year I almost came to blows with one of them. 2nd year we went our separate ways (with the college housing, still hung out in our hometown). 3rd year back to roomies again and been homeboys every since.