A friend of mine once explained to me the “kk” thing.
very often(at least in teenager circles) girls will say “kay” instead of “okay” which spawned the whole “kk” thing. My fried said that the number of “k”s is “proportional” to how annoyed the person is with u. 1 “k” is kind of like giving an abrupt “okay” and means the person isn’t interested in continuing a long conversation with you while “kk” is kind like the happy, chirpy “okay” and means the person u are texting isn’t annoyed with u.
I know it doesn’t make a lot of sense but when do teenage girls ever make sense.