[Castiel goes stiff when Dean touches him, but he relaxes again, staring at his hands and his lap. he doesn't talk for a while, taking the criticism stoically. If he has any rebuts or defenses, he's not sharing them. Even after Dean finishes talking, Castiel is quiet for a long time.]

You were happy, and peaceful, and... retired. You'd sacrificed so much for this cause... I couldn't ask you for more.

[He meets eyes with Dean and looks away again. For an angel, Castiel sure has an exciting lap.]

No wonder you drink so much.