Book 2 of Wrong Number.
New York the big city, the bright lights Dean was unsure if he belonged in New York..
"Who needs a small town mechanic when they basically have robots fixing their cars? I don't think I can do this anymore Castiel."
Wow that was.. Wow.. Ouch.. If Cas didn't feel guilty after this sentence.. Then he's sure as hell doesn't have any blood running in his system
Cas: "Its cold and lonely"
Me: "Ha, what? My life? Yep I agree."
Dean: "Welcome to my life"
I hate this happening but Dean is right. Cas has to have priorities and he made promises and Dean dropped everything he had to be there. Cas is not following through. He needs to train someone to help with the extra work. These meetings could be held in the day time. Enough's enough.