For the last twelve years I've been going in my local pub every Friday for a game of cards and a few beers. It's a nice group and we have a great night. About six months ago, someone new joined us, herein referred to as 'D' - no problem, all are welcome. But he has PC problems, basic ones. A while back I went and sorted his PC for him, which I don't mind doing for anyone. However, he has yet more PC problems, and now believes I am his own personal PC World

Three weeks ago he asked me to spend Saturday morning fixing his PC - I said no. He got really angry and said this isn't what friends are for, now we know where we stand etc etc. We've not spoken since then. Some of the others have expressed their concern about his behaviour. I've said, not to worry and to forget about it. It's not worth the trouble.
Last Friday 'D' invited a couple of friends, and ordered a full spread of food, sandwiches etc for everyone. However, he said the food was for everyone except me...! No problem, I wouldn't touch it anyway.
Then, to my surprise, not one of our group touched the food. In fact, one of my friends got up and told 'D' to his face that if one of his friends was excluded, then he was excluded too, and that he could keep the food. This guy 'D' was then left with a dozen trays of food, and no-one to eat it!
I didn't ask for any of this. I prefer to stay out of the way, mind my own business and not get involved in any aggro. But somehow it has been thrust upon me.
It was a great feeling to find out everyone was behind me. I won't forget that - that's what real friends do. I think this 'D' needs to learn something about friends, because he appears to have none right now

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I now have until next Friday to decide what to do. 'D' needs to be sorted. The last few weeks you could cut the atmosphere with a knife. I'm not putting up with him upsetting everyone like this. It's not in my nature to seek confrontation, but I'm afraid for everyone's sake, I'm going to have to do what's necessary.
Suggestions of a non-violent nature welcome