He knew his brother was broken, but he never imagined just how shattered Sam really was. Did Sam really think Dean hated him that much? That he would be unhappy in Heaven - of all places! - because Sam was there with him?
He wants to take Sam by the shoulders, but he's not sure if he'd shake his brother so hard hoping that he'd come to his senses or if he'd squeeze his brother tight and refuse to let go.
He feels hot tear tracks down his face but staunchly ignores them. Sam, his little brother, the only person in the world he'd do anything for - and he thinks he's less than worthless. Really it's the opposite. Sam always deserved more than this. It's Dean's job to make sure he knows it. It's Dean's job to take care of him.
His voice is still weak when he speaks, a whisper that cracks every few syllables in despair. He needs to make Sam see, but he's not sure he can do it. Not when Sam's this much of a shade of himself.]
"I'd never want that, Sammy," is all he manages to get past the heavy knot in his throat.