How to cope when a friend leaves u

Lwky a rant but I'm actually so pissed I need to tell more people abt this. So, a certain user on here (not naming who...) I know irl and I have been friends with her for a few years now. I shared everything with her, introduced her to bl and we even got married (not rlly tho). Recently, there has been a lot of drama involving a few girls in my friend group mostly about me and another girl. None of it was to do with that user but she ignored me and the other girl even after we all made up and yada yada yada. We tried to confront her but she blocked us on everything (even mggo) and she's still not talking to us now. She sent a whole yap paragraph abt how she always felt lonely and abt how since she can't rely on us we shouldn't rely on her. I was happy that she finally spoke her mind and opened up but then she left the gc and stuff. She said she cut ties with all friends but today the other girl told me that she saw her hanging out with a group of girls that caused us a lot of drama. Most of them started things with me but I had stopped worrying about them. I feel so betrayed rn. I also have so many classes with her so that sucks.

Girl if u see this we NEED to talk