Waiting in the airport to collect my DD from her flight (seriously delayed!) at the end of a great trip she's had travelling abroad with a close friend of hers.
It brings up some very unpleasant memories for me. The plan was to travel for a few weeks in south east asia with my long term best friend, first time I'd ever travelled there. On the 3rd day of our trip she met someone "special" and went travelling with him instead!! It really caused me a huge amount of trouble and stress, traveling alone there was not easy, a few bad incidents, trying to make some other friends along the way. It was also a bit more expensive not sharing a room, and deciding on some safer/more expensive locations.
We're not in contact any more, but I'm feeling angry and agitated as I write this, and think about it again. No more coffee for me!
Any other bad things done by friends were relatively minor for me thankfully.