[ dean doesn't have the time or patience for cas to grow a pair right now of all times. that grip is sparking anger through the fog of fatigue and failure, has dean wanting to shove at cas. but he doesn't, only seethes out the words. ]

Why? Because the moment I knew I was infected, I knew it would hurt you. I knew how it was all gonna end, how it would have to end-- and I knew you'd have to do it. [ i knew it would break you. ] And I can't-- I don't want to do that to you again, Cas. But stayin' with you means something like that will happen again, and I can't--

[ can't put him through that again, or something worse. ]

The only reason you ever get hurt is because of the crap I drag you through. So no more, I'm not doing this anymore. From now on, we go our separate ways, and that's it.

[ he attempts to brush past him again then. ]

You'll be fine without me. You've been up until now.