[Shaun]

generally when it happens it's people I knew in high school and no longer talk to, so I'm not bothered

There was one time a close friend did it and I was a little confused and hurt, and in the end it was because our friendship circle at school was sort-of split into two, and I was torn between them. I prefer hanging around with the group he's in, though, and last year when we met up for Christmas he apologised to me in advance and sent me a really sweet message, and we're good friends again. We just didn't speak about it before because we're on opposite sides of the country.