this is honestly, literally, just
Luke: “How long have you had feelings for R2-D2?”
C-3PO: “That’s disgusting. And wrong. I don’t even get– why would– I’ve never had feelings for anyone, anywhere. It’s none of your– you have– the nerve, the audacity! R2-D2 is my counterpart, technically. And he is terrible, logic-wise. And how–
do I know, frankly, that you’ve not got feelings for him? Maybe you DO. Maybe you’re trying to throw me off!! Hmm??? CHECK and MATE”
(excerpt from The Making of Star Wars)
Best part about this: C-3PO had his memory banks wiped at least once at the end of Revenge of the Sith, and probably multiple times since. Artoo on the other hand is such an idiosyncratic droid that we can conclude that his memory banks have not been wiped during the entirety of the saga.
And no, Threepio. You did not meet Artoo recently. You met him on Tatooine, roughly a year after you were first brought online. And then again ten years later. And then five years after that.