My best man ( FIs older brother) has a wedding for his best college friend the day before my wedding. If hs goes, he will miss the rehearsal and dinner. I don't know if this ia a big deal or not. He hasn't ever been in a wedding and I really don't know what his duties will be. I don't want to be selfish and make him miss his friends day just bc of my rehearsal. What do you think?

"A wedding is a day, a marriage is a lifetime"