I have to work with one. Three years ago I would be ashamed to repeat the same sentence to that man like what if I am doing something wrong or I am (omygod!) bothering him.

And now I don't give a f@ck. It's like a challenge. I will tell him what he need to do with innocent look and "have a good day attitude" all week if I have to.

He is narcissist so I have to choose words wisely. Instead of "you did not send me the letter" I say "I did not received letter from you".

It is exhausting but I have to work with that somehow.