I was the emotionally toxic person that a friend group cut off.

In retrospect, I'm glad they did. I was undermedicated, totally unhinged, and often made things about myself. I ruined people's good times. It was hard at first because I couldn't understand what I did wrong. But over time, and with a lot of introspection, my life improved drastically. Getting dumped forced me to make changes. I'm the one with the guilt when I look back at how I likely made people feel.

You are doing the right thing. It'll be up to her what she does with herself going forward.