DP has a friend (let's call him X) whom he's known for about 30 years. I first met X about 15 years ago, not long before I got together with DP (same group of friends), so he is the friend of both of us, even though X obviously knows DP better than he knows me. We all get on well together; in the past we have been on holiday together, and X has stayed with us the last two Christmases (he is a single man).
But a few months ago DP and X fell out. It sounds like such a daft thing. DP lent X a couple of items, but then X said that these items weren't 'lent' but 'given', and so he doesn't want to give them back. That's not a big deal really; and DP says he can live with that.
I have phoned and texted X several times in the last few months - not to ask him about any of that, but just to ask him how he is. But no reply to any of that (just got the answerphone). Today DP and I bumped in to X out of the blue and we had a drink together. Then X just left, saying we had never helped him when he needed help and he wanted nothing more to do with us. (But see above re: Christmas, for example!)
My DP is so upset. He doesn't know what he has done wrong. I am very fond of X - but if he won't talk to either DP or me about this, what can we do?
(Sorry for ranting.)