Why was it so easy to see that sort of fondness that others carried for one another, but when it'd been set in his direction he'd remained oblivious for so long? Whatever his feelings were, it was clear Aziraphale was a good friend of Crowley, if nothing else.

"Mm, may you have more luck with it than I've had," he gives a slightly cleaner bow this time, as he leaves, since Aziraphale seems to be familiar with them.