Am I in the wrong?

I have been in a friendship group of 6 women for the past 13 years. I am 31 so we have essentially grown up together and been through so many ups and downs. I have no family in my life so I guess in a way I view my friends as my family which I know can lead me to having high expectations and standards of these friends even if that isn’t right. This past year the friendships have shifted a lot and I found myself being literally the only person to reach out and make plans etc. Naturally in the group there are some people closer to others and that’s fine (for example I am one friends maid of honour and no one else was asked to be in the wedding party) but I don’t feel like I am being treated very nicely and I can’t tell if it’s a me problem or not.

This year I have noticed I am repeatedly ignored by 3 of the 5 friends. I have been ignored over text and in person, I have been left on read for days on end, they never interact with my social media or anything really (even when I post updates about an illness I have) and I recently went through something extremely traumatic and they weren’t there. I am always the first there regardless of how close I am with the person and I would never ever ignore someone or intentionally leave them on read, I always interact with everyone’s posts etc and I always celebrate the wins but I cannot seem to get this in return. The person I am MOH for is truly my best friend but at the same time she’s a ‘I’m not getting involved’ type of person and I do feel like she has a herd mentality if that makes sense, in other words she would never have my back and prefers to avoid conflict. I have expressed my concerns to her and she thinks I’m being dramatic and that they are just ‘strange’ but being repeatedly ignored, left on read etc is really starting to drain me as it does not happen to anyone else in this group.

Sorry I know this is so long but I am struggling on whether to just leave this friendship group and risk a very awkward dynamic especially with my friends wedding coming up or if I am being dramatic and need to calm down!?