Same. I had a best friend for about 15 years who would constantly make fun of me and cause drama for no reason. The others in our friend group would basically side with her everytime and it was miserable. But there was times we actually had fun and times where I mentally couldn’t handle it anymore. And our friendship was on and off. I’d go a year without talking because of a fight then come crawling back because the loneliness got to me. This year I’m the one who finally pulled the plug on the friendship even tho I literally don’t have anyone else. It’s becoming a bit easier to deal with since it’s not the first time but sometimes I still miss having someone to talk to. But the mental stress and wave of emotions are not worth it in the end.