Because seriously, Dean is no longer Dean because of you [Sera Gamble]. What happened to Dean believing that you do everything you can to save your family? What happened to him sacrificing himself for his family? What was the point of him claiming that Castiel was his family at all if Dean refuses to treat him like he is? Yeah, Cas lied and did something incredibly stupid, but so did Sam and Bobby and Ellen and Jo and everyone else Dean has considered family, yet Dean more than willingly forgave them for what they did. But Cas is some kind of exception? After three years of getting to know each other (especially since Dean had known the other members of his family for longer) and becoming practically best friends, Dean is just going to give up and say “Oh well, I haven’t tried everything, but whatever. I’ll just watch hentai and hope for the best.” BULL FUCKING SHIT! I’m not buying what you’re selling.