After their brief exchange on the network, Crowley had to think back about how it might seem to Castiel to see Crowley again after such circumstances. He'd last seen Crowley when Crowley threatened to crush him between his teeth (good times) and missed out all the delightful little times they'd shared since such as Castiel and Crowley butting heads over the tablets, Rowena's attack dog spell, Lucifer possessing Cas and using Castiel's vessel's vessel to treat Crowley like his bloody chew toy and then some, Castiel twiddling his thumbs whilst Crowley was trying to rescue him from being possessed by Lucifer whilst getting pulverised by him...
... and of course, Crowley would follow up by saving Castiel first, yes, he saved Castiel first, by breaking Michael's lance when he could have used it to kill Lucifer and solved SO MANY PROBLEMS, but instead he saved Castiel from dying, and then of course he did the whole suicide-by-proxy move of saving the Winchesters' sorry hides and sticking it to Lucifer.
Yep. He was done helping them. Sure, he wasn't going to try to kill them again, but he was not going to do anything monumental like that anymore, he was doing things for himself for now on.
So as he walked into Common Grounds and slipped in to sit opposite the trenchcoat-clad angel, he gave him a smile and was prepared to answer any and all questions, and he'd pull no damn punches about it either.
"Hello kitten, long time no see," Crowley smirked, ordering himself a coffee and some honey tea for Castiel when he requested it, though he had a feeling that the little ducky would rather play with his marshmallows, "Alright, lay it on me. What do you want to know? I'm an open book."