Driving along hedge-lined country lanes at breakneck speed, Crowley notices that not only has Aziraphale been uncharacteristically quiet for the last hour or so, but that he is now staring at him intently.
Crowley sighs exasperatedly. What now?!
"Yes?" he snaps irritably at Aziraphale, who shakes his head as if trying to clear it of a reverie.
"Crowley, my dear", Aziraphale says after a short time has elapsed, "You do know that I love you, don't you? With all my heart."
Crowley jumps as if bitten.
"Bloody hell, angel. You nearly made me crash the car" is all he says.
Aziraphale winces slightly, presumably at the swearing, but says nothing more on the subject.
In fact, Crowley is mostly just surprised that Aziraphale felt the need to ask at all.
Later that day, after Crowley has kissed Aziraphale for the first time, he wonders which of their sides created love. He has observed it do as much evil in humans as good. As Aziraphale snakes his arm around him, he decides that it's probably one of those few concepts that was created by neither side. It's a funny old world, he thinks as he falls asleep on Aziraphale's shoulder.