"O-oh," stammers Aziraphale when he realizes what is happening. "Oh dear. I-" He reaches out but doesn't quite touch, not sure what would be welcome, or what to do. The poor creature. He is so very far from home, this all must feel so terrible and lonely. And here he is babbling about new homes, making a mess of things as usual.

"I'm sorry," he says softly, and after a moment of hesitation rests a gentle hand on Jay's shoulder. "I know this is very hard. But you don't have to go through it alone, you know, we try to look out for each other. I try to look out for everyone, as much as I can. It's more or less my imperative."

Is any of this helping? Probably nothing will help. Whenever humans get like this it's hard to cheer them up again, and Jay probably isn't that different in that regard, in spite of his non-humanness.