My "godson" (not official, mum just decided one day) is turning 5 at the weekend and he is having a typical kiddies party at the local soft play. His mum, my old school friend, expects me to go but I don't think it's my scene- I am an unmarried, happily childless person who lives well over a 2 hour drive away. I didn't attend his party last year and mum was very upset and angry with me. I used to always go when he was younger as there would be lots of adults and family there too. Godson won't miss me and I'll send a prezzie in the post... Is this really so unreasonable of me to not want to go? How to I let them down gently?