Of course, he's a tad bit curious about who happened to see such a moment in Crowley's life - a terrible, low moment, it very clearly seems - when Aziraphale himself wasn't there to see it. Not that he would like to his bookshop burn, and even less that he would want to see Crowley in the state he's hinting at having been. It would have been too much.

The angel is suddenly very concerned, a million more questions popping up in his head, and the urge to turn around and look at him, to do all the things a fussy concerned loved would is probably expected to do. But he feels Crowley hiding against him. He feels the tight grip of his arms, and the vulnerability and hurt emanating from him could well break the angel's heart.

So he sits still, and silent. Lets the moment settle, reaching his hand up to gently touch Crowley's hair, his other hand rubbing at his arms.

"Well." He attempts, quietly, leaning his head gently against the demon's. "You haven't lost me, my dear. I'm right here."