Crowley's never felt love like what he feels for Aziraphale. Even the love of God, which is supposed to be unconditional, has all sorts of conditions that Crowley never knew and boundaries he wasn't told about when he crossed them. Aziraphale loves him without boundaries and conditions, though, and he thinks he should be terrified of that, but he isn't. He just feels welcomed to it, embraced by it.

A slow smile spreads across Crowley's face as he looks at Aziraphale, hands still cupping his face.

"They won't take it away from us," he says. "Even if they catch us---which they won't---they can't take that away. Hell can't make me not love you, angel."