Who to choose to be my maid of honor?

I'm getting married on September 25th and I'm having trouble deciding on my maid of honor. First my fiance & I were going to have just family in the wedding party, but after some thought we'd really like to include friends. The wedding party includes my soon to be sister in law who goes to school in West Virginia and another future sister in law who lives locally. I have my sister in law who lives in Virgina and then I have two friends who are local. I've decided my sister in law from Virginia will be just a bridesmaid as she isn't local. The soon to be sister in law who lives local I cannot see being my maid of honor as she just isn't a family orientated person, I love her and we can talk about our lives with each other, but recently when celebrating a birthday she up and left with a friend. She's 20 so she's sort of wrapped up in her life right now, which at her age is completely understandable. She's into the wedding though and extremely excited to be apart of it and even came with me to meet the person at the ceremony & reception place. Then I have the other future sister in law who goes to school in West Virginia. She would be my pick for maid of honor, but I'm concerned because she'll be at school she won't be able to fulfill the MOH duties. Lastly, my two best friends. I've been friends with the one for maybe just a year longer and we all would spend a lot of time together before we had our kids. Once we had our children it did lessen our time together, but we always stayed connected. The one friend I see more often, but I can't see her being my MOH due to her being very selfish, not dependable as she doesn't drive and she doesn't have much help with being able to get a sitter when we would have to do wedding things. Also, I get the impression she may be jealous that I'm getting married and her boyfriend is a low life as she doesn't ask me about any wedding planning or wedding related at all! I'm always doing for her, but she definitely doesn't do for me. We have a stronger connection though compared to my other friend and we can talk about everything with each other. We've even lived together in the past and she remembers us telling each other we'd be each others MOH's when we would get married, even though I don't remember. Now the other friend I find to be very into the wedding planning as we went to dinner recently and 90% of our conversation was wedding talk. She came with me to a bridal show and wants to go to more. She's a lot more dependable and is able to get a sitter if needed. I feel as though if I choose the girl that I want to be my MOH it would destroy my friendship in some way with the other girl. My fiance says it's up to me, my mother tells me that I shouldn't go with either as my MOH because of what it might do to the friendship with the one girl. My mother in law thinks I should go back to either just having family only in the wedding party or I should choose the girl I want and deal with the drama from the other friend, even though planning my own wedding I don't want to deal with drama. Also, I will add that right now the one friend that isn't so dependable and I wouldn't want her to be my MOH doesn't know that I'm considering even having her in my wedding. Please help! I'll take any advice given into consideration. I just need help making this decision! THANKS!