Then add the fact that you've probably been a bridesmaid or maid of honor in one of your best friends' or sisters' weddings before, and the whole thing is so confusing, you have no idea where to begin.
Don't use an algebraic equation to help choose your maid of honor.
If you were in her wedding but not a maid of honor, but you're closer to her now than you were when she got married, then that's worth more than your other friend who-whoa, pump the breaks.
If someone you're considering doesn't fit that bill, they probably shouldn't be your maid of honor.
There's no rule written saying you need to choose a sister over a friend, although choosing family over friends often provides an unwritten pass to neutralize drama between friends who think they should be the maid of honor.
Friends often think they can't trump the family card, so even if they have expectations of being the maid of honor, there's no way they'll be mad at you for choosing a sibling.
If you can't decide between two or three different friends or family members, why not choose them all? Your maids of honor can share bridesmaid duties and split maid of honor responsibilities-or you can even delegate which tasks you'd like them to handle.
Ever heard of a "Bridesman" or a "Man of honor"? Your brother can be your "Man of honor," and so can your cousin or your best guy friend.
Even if you were a maid of honor for your friend's wedding, it's completely fine to choose someone else as your maid of honor.