Been off booze for a month but went out last night for a few real beers with a mate. He went and bought a bottle of red wine whilst I stayed on beer. We have been friends for nearly 30 years and never had a cross word. His demeanour flipped, towards the end of the bottles contents, from let’s have a catch up and a laugh to thinking he could get away with saying something quite arrogant and hurtful. I stood up, left my pint and walked out and I think that’s the end of a long friendship. I fell out with another longtime friend a few years ago, who also used to flip, always when drinking red wine. Is it the wine, the person or me?