When I get an urge to leave the group, I usually just leave without saying goodbye.
I’m often the first to get to shul and the first to leave.
I don’t like waiting around to talk to people because that feels like low status behavior. I hate waiting for people, period. Every minute that somebody is late, I feel it as a personal insult.
I hate saying goodbye because it is rarely a substantive interaction. Instead you just exchange pleasantries and who needs that?
Sometimes saying goodbye is painfully intimate. I don’t want to look into someone’s eyes and say what’s on my heart. So I just skip out.