What is your friendship deal breaker?

(Place self in this scenario) “I have known this person for a long, long time and we shared many highs and lows, but if I discovered this person ever did _____ (choose up to three) _______, I would terminate the friendship unceremoniously; in other words, drop them like a load of dirty baby diapers never to look back.” What is your unforgivable thing that would take down a close long-standing friendship?