My gut feeling is that I’m not being unreasonable to end a friendship over this. A long-standing friend of ours drove home after drinking a large amount of alcohol at a barbecue recently. My sister was serving the drinks and saw exactly what he had drunk (spirits). Everyone tried to stop him from driving home, offering lifts in their own cars etc. He point blank refused, claiming he hadn’t had much and would be fine. He really wasn’t ok to drive! My partner and I really don’t want to continue the friendship with him. Apparently it’s not the first time he’s driven off over the limit, but he’s never been caught. We weren’t aware of this previously. For personal reasons, my partner and I take a really dim view of his behaviour. We have expressed our feelings to him and he was in complete denial, and in fact got quite nasty with us. Are we overreacting?