My bridesmaid bailed on my wedding then said yes to my moh.

So I have been planning my wedding for over a year now, and I asked my closet friends to be my bridesmaids about 3 months after being engaged, because I know what its like to be asked last minute and not being able to afford it. So I asked them all and they all said yes. Well one of my bridesmaids was becoming a little distant with us and just didn’t seem like she wanted to be a part of the wedding. I asked her if there was anything going on and if she needed any help, she said no, but was still distant. A friend of mine asked her if she still wanted to be a part of the wedding and she said of course. We go to look for their dresses, and she didn’t buy hers at that time.. no big deal because we still had plenty of time for her to order it. I then messaged my entire groupa few months later and said hey I’d like to get together once all the dresses come in and add a lace insert to the slip which I will pay for we just need to wait on the bridesmaid who hasn’t purchased hers yet. So I texted her privately and said we are getting closer to the date and this dress takes awhile to get in and then we have alterations and now adding lace to the dress. She texted us all back and said she can’t be apart of the wedding due to financial issues. Well we all offered to pay for her dress and she still turned it down and said she prefers to be a guest. Now my maid of honor is getting married next year, and asked me to be her moh, and to my surprise the girl who said she can’t be in my wedding, so I was curious to know what her answer was, and my moh said.” Well she said yes, because she has enough notice to be able to save for the Dress”...😑 I don’t know how to feel at the moment because I gave her time we offered to pay for the dress and she said no, but not even a month after saying she can’t for mine she said yes to my moh. Now everyone is asking me what am I going to do about this and I honestly don’t know. I don’t want to say anything and start drama for my moh With her wedding planning,but I also want to know why she said no to me when we got closer to the wedding then says yes to my Moh. Also I am trying to be the bigger person and still wanting to invite her to the wedding but I’m uncomfortable now because she won’t talk to me but we will obviously be around each other for when my moh plans her wedding. I don’t know what to do😩 help!!!