[Aziraphale laughs quietly, placing his hand on the crown of Crowley's head and gently scratching at his scalp, mindful of his braid.]

As I told you that first night we were together, I'm all caught up to you now. I can't imagine anything changing that.

[The angel may need some time (like, say, over a century) to come around on an idea, but once he puts his mind to something, he really does give it his all.]

But it's all right to be a little nervous, too. It takes time to settle into new routines.