The family drama is long and complicated so I'll try to summarize. I'm the youngest of 4 girls in my family, we're all in our late 20s/early 30s now. My two middle sisters, K and S, have always been very toxic and downright mean which came to a spearhead at Christmas 2017. We all used to go to our parents house and that year it ended with a screaming match between me and K. I left Christmas morning on the 10 hours drive home and haven't  spoken to K or S since (fwiw I made separate plans to spend time my my parents without siblings).

I'm certain of my choice to cut K &amp; S out of my life because they're honestly terrible and manipulative people. They even make our mom cry from bullying her too. My question is about how I reacted with my oldest sister, B.

B and I are 6 years apart and were not very close until I was an adult, so still in the last 5-6 years really. Prior to Christmas 2017 I had tried to talk with B about my issues with K &amp; S, and how they make me feel like utter shit, but every time I tried to bring it up B shut it down. She'd outright tell me "I'm not having this conversation." I respect that she has a different relationship with our sisters and I understand why she doesn't want my issues with K &amp; S to taint her relationship with them. I'm okay with that, but it means that B has never heard my side of why I can't be around K &amp; S and presumably she's given them the same stonewall on the issue. I respect that she doesn't want to choose sides so I don't push the issue.

After the Christmas 2017 fiasco, B was upset with me and while I was packing up my stuff she accused "So you're not even going to try?". I literally said nothing back to her, I knew I was too upset to say anything I wouldn't regret.

I was angered and hurt by her accusation, particularly because every time I tried to confide in her about my problems with our sisters she would shut that down and not hear a word. So it never occurred to me to explain to her my decision to leave and I was more thrown aback that she'd be upset with me for it. I own up that I was acting selfish by leaving but I stand by my decision for the sake of my mental health (which is another point of contention with K &amp; S).

All that said, when I cut out K &amp; S, I also cut out B. At the time, I was not in a good place to deal with any family. But I haven't reached out the B in the year &amp; change since. And honestly, I've never been happier than in the time since I've cut ALL my sisters out of my life.

So WIBTA if I continued to cut B out of my life? I definitely think it's selfish but would it make me an asshole to continue cutting B out of my life since she never did anything directly wrong? 