Co maid of honor

I have recently made my younger sister my maid of honor (19). But I feel that I should have a second maid of honor because my sister is still underage and it’s a lot to put on her. Anyway, I am stuck on trying to figure out who my second maid of honor should be. My two choices come down to a friend or my cousin. My cousin and I are about two weeks apart in age and used to be incredibly close. As the years went on we have drifted apart though but when we are together it’s like nothing has changed. But she lives in California while I live in Colorado and all of the wedding planning is here too. My second choice is a newer friend. We’ve been friends for about two years but she lives in the same state as me. She has also been helping me with many wedding related tasks such as my engagement shoot as well as dress shopping. I guess my real question comes down to who should I pick ?!
Is it weird to pick a friend that I’ve only known for a few years ? Or should I stick with family ?