What Should i Do?

I was really hesitant to post this, but I honestly don’t know what to do.
So I posted yesterday of my makeupntrial, I also shared the same pics in the WhatsApp group chat with my BP ladies. I have a BM who is my older cousin (cousin C) and she hasn’t been a fan of some of my major decisions, including hair styles for the BP( we figured, settled and all came to an agreement on that ) BMs dresses( I had to put my foot down on that one which was settled in the end) and now MY makeup. When I posted the pic, in the group chat, the other girls had their opinions like, “pretty, eyebrows should be closer, looks nice...” but C said the foundation shade looked too light , which I agreed to looking at some of the pics and the “look was too simple for a bride.” I then replied and said jokingly “my friend ( I say that a lot when I’m trying to be funny), I think this is already too much makeup, lol but I like it “
This morning, I see that one of my other BMs directly replied her and said, “ but I think that’s the way that Kennyeh wants it”. Then after that, I see that cousin C “left” the group chat.
I don’t want to force anyone to do something that they don’t want to, I also dont see the point in “running” after someone or begging them to do something. I just really want to know if leaving the group chat means that she’s leaving the BP. Like literally ask, “ hey C, I see that you left th group chat, I just want to know if you are still interested in being a BM or naw?” I don’t care on why she left as she didn’t care to communicate with me before or after she left. I don’t care if she left because of me or because of the other girls. Should I care? Should I initiate a conversation ? Sorry for the long post.