Help! Bridal party drama

Hi all,


So I’m hoping people here can give me some advice. I recently got engaged to the most loving partner, we’ve both always known that we wanted an intimate wedding with our nearest and dearest and are currently planning for 2024. I have one sister and 2 brothers, my brothers are both married with kids and my sister is older than me and single, still living with our parents. My sister and I have always been close, until recently that is. When I got engaged she was the only person I thought of being my MOH, I have lots of friends and some I am very close to, they’re like sisters to me. Anyway I asked my sister to be my MOH and she accepted, I also mentioned that we would prob have some of my friends as bridesmaids but she blew off the idea saying she would be fine on her own. I explained that my fiancée is having 4/5 groomsmen and we’d discuss it closer to the time as we hadn’t made any decisions yet. Then things turned….
Since that conversation, which wasn’t fraught or tense she has basically stopped engaging with me about anything wedding related and even on the daily sisterly stuff. She recently visited with other family members and left our home without even saying goodbye, while here she treated people appallingly.
I have mentioned to a couple of my closest friends about being bridesmaids and they’re over the moon with excitement and ideas, but, I havent told my sister. I know that when I do there will be drama and she will make it all about her. When she was here I tried talking to her about wedding plans and the bridal party but she cut off the conversation and didn’t engage at all.
I just don’t know what to do anymore, I feel like she doesn’t want to be a part of the wedding but doesn’t want to be the person to pull out and I know if I ask her the question she will accuse me of not wanting her, which isn’t the case at all.
I’m now 9 months to my wedding, no bridal outings, no exciting build up, no dress shopping done (I dread asking her to come as I know she’ll spoil it or won’t turn up) and am utterly exhausted thinking about how to navigate this without causing drama in the family or damaging a relationship. Am I being unreasonable by wanting more than one bridesmaid? Has anyone else experienced this?