Sam and Dean in “Unfinished Business”

Sam

Dean... is there something you wanna say to me?

Dean

I tried, Sammy. Man, I really tried. But I just can't keep pretending that everything's all right. Because it's not. And it's never going to be. You chose a demon over your own brother... and look what happened.

Sam

I would give anything, anything, to take it all back-

Dean

I know you would. And I know how sorry you are, I do. But, man... you were the one that I depended on the most. And you let me down in ways that I can't even... I'm just- I'm having a hard time forgiving and forgetting here. You know?

Sam

What can I do?

Dean

Honestly? Nothing. I just don't... I don't think that we can ever be what we were. You know? I just don't think I can trust you.