He hates formal occasions/dressing up. In HS complained about going to my proms and tried to bribe me out of them. His sister got engaged and he has to be an usher (treated like groomsmen) at her wedding. That requires 1,000 times more formality/dressing up and he hasn't complained a bit and I do KNOW he'd choose a prom over ushering a wedding! Importance of prom date vs. usher is debatable, but I feel like he shouldn't complain about either. I'm thinking maybe he sees it as that he has to go cause its a family obligation, but he asked me to marry him so that (should) mean I'm his family, too and at least as important! Again not complaining that he is willing to be usher just that he wasn't as willing to take me to prom.
P.S. I don't know if its relevant but he says I can look "good, but not great" and not wear sparkles/bright colors so that way his sister won't feel like I look better or am taking away attention from her.