[It's hard—impossible—not to think of Dean and his reaction to it all. As close as they were he couldn't understand how Sam was feeling and Sam didn't do much to make it easier. Keeping it inside. Staying strong. He knows that drill.
He puts down his now-empty glass and motions to the bartender bots for another round.]
It's hard enough to understand when it's happening to you. Someone else understanding... It's not something you expect.