My best friend left a relationship a year or so ago and got himself a new girlfriend a few months back. I am genuinely pleased for him as in his previous relationship he was cheated upon regularly but his new flame is really nice.
His new girlfriend has a son and it was recently his 21st. I was invited to the party. Having never met the boy before, I turned up with a bottle of prosecco and a card with £50 in it. My best friend told me that he was really disappointed in me and that I should have given more. I'm not exactly Jeff Bezos in terms of money and as I hadn't met the boy I thought I was doing good. AIBU?