"Out of everything you've lost!" Crowley shouted, "Your mother. Your father. The alcoholic bookkeeper. Your girl. Your half-brother. Even that bloody angel you can't seem to find..."
Crowley stuck the blade into Dean's shoulder, twisting it around just for the hell of it as Dean tried to suppress the urge to scream.
"The one thing you can't seem to give up is that Sasquatch you call a brother!"
Dean didn't respond, just spit the blood from between his teeth in Crowley's face. Crowley yanked the knife from Dean's shoulder and casually wiped the blood Dean had spit at him off his cheek.
"It's unhealthy, you know. The dependence you have on each other." Crowley sharpened his blade absently on the table saw, "He dies, you sell your soul, you die he goes mad, he dies again, you disappear off the map, you go to purgatory, he gets with a BLOODY FUCKING VETERINARIAN."
"I'm not gonna abandon Sam." Dean managed to rasp out.
Crowley laughed in a hollow kind of way.
"Really? Well you know you two are never gonna be the same again. You have to face the fact that Sam has changed. He doesn't need you anymore."
Dean smirked weakly, "Well, maybe not, maybe I need him."
Crowley laughed, "Oh god, those other nitwit demons were right, you have an abominable sense of self worth."
The smile slowly faded from Dean's face and he spat some more blood on the ground.
"Why don't you just kill me, Crowley?"
Crowley laughed weakly, his back turned away from Dean as he turned his knife over in his hands.
"No." Crowley said.
His voice had a chilling softness to it as he shook his head saying, "No, no, no. I won't kill you because you want to die, Dean, and well...
Crowley thrust the blade violently back into Dean's wound again. Dean choked on a scream as the blade twisted.
"I'm not in a very merciful mood."
