Growing up I was raised that if your significant other has a sister or brother they would be apart of the wedding such as being a bridesmaid or groomsmen. That was the proper way of saying "I'm marrying your sister/brother and I am looking forward to being apart of your family." All of my family members have done this even if they weren't that close to them. My fiance disagrees. He does not think my 2 brothers should be his groomsmen because in his mind they aren't his friends.
Again we're different. My father is paying for the wedding and would love to have my brothers in the wedding but my fiance thinks it's stupid.
What is the right thing to do and what would you do in this situation?