Crowley exhales. Maybe for the first time since they'd heard it, their breathing harsh as they bend down again, pressing their lips to Aziraphale's briefly,  then to each cheek, over and over again. 

"I love you," they say, their voice still cracking and sounding anything but cool, "Angel, I've loved you for so very long." 

Their fingers slide into his hair, stroking it gently as they press their foreheads together, feeling like they could float away at any moment.