The DUMBEST all time reason for someone ending a friendship. COMPLETELY DISAPPEARING. It's what they call "ghosting" now. I know it is done terms of relationships and dating, but it happens in friendships too, moreso now than ever.

It's commonplace now for people to be super crappy and just end friendships, block people, and cut off all communication with you. Apparently avoiding people is the new thing to do.

This is the cruelest form of ending things, because you never get to know what you did, or why they ended it.