I was invited out to a 'comedy club' tonight with a couple of frens. I left at 9pm and said it was shit and I left my two frens in the pub. My mum told me I'm mean and I should have stayed, even if I wasn't enjoying it, just out of decency, and I might ruin a friendship by leaving so abruptly. I said I don't care. If I'm not enjoying it, I leave. Am I in the wrong?