Maid of honor dilemma

I’m getting married this year and am in the process of picking out my bridal party. I have 2 sisters, and in an ideal world I would have them as my maids of honor. Sadly over the past couple of years I have grown extremely close with one sister and have drifted apart from the other. Without going into too much detail, I love her dearly, but there have been some major issues that has caused us not to be so close. I want my other sister standing next to me on my special day and can’t picture it any other way. I don’t want to not tell my other sister, but I don’t know how to without hurting her feelings. How would you address this? TIA