some level of fake-ness is mandatory with every social interaction, at least if you don't want to become a freakin pariah. it's not really socially acceptable to share your every feeling with everyone you come across. of course, I'm not saying you should totally not show any of your feelings, in fact, it's a good thing to do that but like, y'know, within reason.
it reminds me of one of the first scenes in American Psycho where Bateman is standing at a coat check (maybe I can't quite remember, something to that effect at least) and he fantasizes that he tells the coat check lady "you're a ♥♥♥♥ing ugly ♥♥♥♥♥. I want to stab you to death, and then play around with your blood." of course, that's a giant exaggeration, the movie's a satire and it's played for laughs and hopefully no one actually thinks things like this but I feel as if it's somewhat relevant maybe....?