Were getting married in 2020. I know it's ages off but I'm stressing out about my partners choice of best man. My partner and I are both divorced and he wants his friend as BM even though he did it first time around. That on its own isn't a huge issue but what is is that the BM and I can't stand each other and don't speak. His other friend has asked to be BM and him and I get on really well. The chosen BM's wife and I hate each other and she is friends with the ex wife. The chosen BM has drink issues and goodness knows what state he will be in. He starts drinking as soon as he wakes up and is lewd and foul mouthed. My partner feels duty bound to have him as BM and I know it would be a disaster. Any suggestions/solutions?