Mistake in choosing bm

So my big day is only 3.5 months away. And I currently have 10 bridesmaids. I think I may have made a mistake asking 2 of the girls. One of them is my FH’s brothers gf who i’ve known for some years but still not really that close with. Another is my FH’s cousins gf, she and her bf lives with us for over a year which includes times before we were engaged and time we were. They’re the only bridesmaids that are close besides FH’s younger sister and they can be so wishy washy. I feel like they treat me like I annoy them. The one who lived with me would literally talk to me while we’re out with the family and then 2 min later just walk off with the brothers gf and not talk to me for the rest of the night out of nowhere. I don’t usually make new female friends because of behavior like this but I feel like since they’re the only close family my age around I’m forced to “hang out with them”. It really annoys me that they treat me like this and I feel like at this point I’m kinda forced to keep them as bridesmaids. They even told me they won’t even be around the day of the wedding until after 3pm (5:30 ceremony) because they don’t want to get their makeup done earlier and chose someone an hour away and tried to make it my fault. Anyone have any advice moving forward dealing with them? Not only will they be involved in the biggest day of my life now but will be around constantly afterwards as well. I’m at the point where I can just cut them off and not feel bad but I know the family will be disappointed