For the anon in search of "fics where one thinks they’ve been dating for years but just taking it slow but the other is p i n i n g", I found one that fits the bill perfectly! "A Bit of Miscommunication", by KLambert98. There's also "it's affection, always", by oopshidaisy. (To the mods: If you are able to pass this on in a comment on that rec post, that would be wonderful — thank you!)
I decided to publish this just so it wouldn’t be missed in the comments of that post, especially since we do things on a queue!
A Bit of Miscommunication by KLambert98 (T) Crowley loves an angel and was pining hard. Aziraphale loves a demon and had thought they'd been dating for the past century. Aziraphale is terrible at communication.
It’s Affection, Always by oopshidaisy (T) Nobody ever accused Aziraphale of being quick on the uptake.
~Mod K