I have a Mini Cooper S 2010 (Hi! His name’s Irving!:)) and you’re exactly right - Mini recommends an oil change every year - around 10,000 or so miles (they said it can be flexible). If you are too concerned though and decide to go with your boyfriend’s thoughts - Mini’s oil changes are supposed to be free for the first year, so no harm no foul should you decide to do more.
Best of luck to you and your motoring!