DP and I have separate accounts and one together that we use simply for bills and household stuff. We aren't married and have only been together 2 years so not quite ready for totally joint finances yet. The other day we went go-carting with my family and friends. We went to pay and he said 'I've paid already' - I thought it was a really lovely gesture and we all thanked him for spending the best part of £100 on us all. Thing is, he hadn't paid for it. He took it out of our joint account so essentially I paid £50 for my friends and family without being consulted as half the money in there is put in by me. Now don't get me wrong I am quite generous with money and would probably not have minded if we could afford it and I had agreed, but we can't, and I didn't. We have debts which we are trying to pay off, bills, mortgage, car repairs due, etc etc. We don't have much money and live on a fairly humble wage.
AIBU to be angry that he spent £100 of our money without consulting me first? He doesn't think it's an issue and keeps telling me I'm being silly and it was a nice gesture. Who's wrong here? (Can I just state that I ask him if I'm even going to buy something out of our joint account even if it's £20 as we don't have much money and it's common courtesy IMO)