Hello and goodbye are matched sets. But people seem to do  hello better than they do goodbye.

Am I in the Hall of Fame of great good byers? No. Are there many different goodbye situations from leaving a job to breaking up with somebody to exiting from a party making generalizations difficult? Yes. Are there rituals like graduation ceremonies society uses to facilitate goodbyes? Yes Are some of these goodbye ceremonies artificial?.  Can it be hard and sad to say goodbye? Yes.

What’s my point? From the perspective of the goodbye sayer, not saying goodbye is rebellion against finality and impermanence. We will meet again so this is not goodbye. But from the perspective of the goodbye recipient, not getting a goodbye  is like you are the one who has disappeared or perhaps you were never there in the first place. Why create angry ghosts? Write in their yearbook. Say goodbye please.