Not the only thing. There are others; Dean. Grudgingly, Sam. Gabriel, Anna. Free will and humanity and other words that don't mean the same thing to an angel. A stubborn refusal to admit that it is highly likely I fell for nothing.
And I know that. I conducted the ceremony, after all. I see you two together and it is one of the small miracles that reinforce what faith I have in humanity's capacity to do impossible things. It is almost enough to make me forget how unworthy of you he is.
It was not meant to be cruel, I know that. You thought you were doing me a kindness. There are no moose heads in your house.