AITA when I lost almost all my friends?

I (F20) had lost almost all my friends. At first, we had a big friend group around 10 people but now I only have 2 of my friends.

Back in February of 2025, two (my best friend and Ris) of my friends got into a huge argument that lead to a huge gap in our friend group. At this time I had dropped out of school due to mental health issues and that left my best friend (F23) alone in our classroom since we didn’t have any other friends from there other than Ris (F23) who had a fight with my best friend. Ris at the time was spreading rumors and isolating my best friend inside the classroom. My best friend is a major depressive (diagnosed) and did not really take this well and eventually dropped out of school. It has caused her mental health declining for the majority of the year.

We cut Ris off because of this, since she has caused a lot of damage to my friend and I thought that was it. One of our friend, Rei (F21) suddenly started talking to Ris and hanging out with her again after. We were very hurt by this since we would have never done that to her if someone hurt her so badly. And I couldn’t comprehend why someone would want to be friends with someone who’s a bully.

Around November of 2025, one of our friends claimed that she didn’t really care if Ris and Rei hurt us since she wasn’t the one who was hurt by them. I still couldn’t comprehend this since we were all angry at her ex bcs he hurt her and I just? My sentiment was if I started to be friends with him again, are you not going to be hurt and angry? I don’t understand, I would’ve never done that to them.

And yesterday, one of our friends, Que (NB19), started being friends with Ris again and I’m just thinking if am I being unreasonable for this? Is it my fault? Is it really bad of me to not want my friends to be friends with someone who has hurt us?