[Well, at least he knows it's mutual. He has no doubt about that. Crowley, who saved him in many occasions, who did Hamlet for him, who literally walked up to heaven for him- he wouldn't want him to be alone here.]

I do. [His only true friend, really.] It's hard to explain, but- let's just say we've always been there for one another. Even if we sometimes didn't talk for a long, long time I'd always known he was there.