Weddings are like every other social event. Your invitation should give you a clue as to the formality of it. You dress smart, but don't go over the top. You don't have to dance, no one is making you and you're certainly not the centre of attention.
You just have to show up and be polite to the relatives and your friend will just be happy you went. Mostly the whole thing is quite boring, honestly, but it will be fine.
You just have to show up and be polite to the relatives and your friend will just be happy you went. Mostly the whole thing is quite boring, honestly, but it will be fine.