i think that when it comes to their break up, they were both at fault sometimes, and sometimes, one was more at fault than the other...but they were both at fault. brian's not completely to blame, and neither is justin. they both needed the break up. justin, so that he could find his balance within himself again, so that he could be strong enough to be with brian, and brian so that he could realize that hey, he did love justin and maybe, just maybe, letting him know(in his own way)wasn't that bad or difficult. they needed the break up so that they could both be strong enough to be together.

also, i just wanted to say that i don't love one character more than the other. i can identify and relate to brian more, yes, but that doesn't mean that i love justin less. i love them both and even more so when they're together. :)