We both suffered from depression for many years. One day I decided it couldn't go on forever this way, and I picked up the fight. I went to therapy and changed many things in my life. Over the months, this created a rift. She was happy for me that I went to therapy, but didn't want to do it. That's just fair, just because I change I can't expect her to do the same. But talking with her got more and more draining this way. I tried to talk about nice and positive things, she was in her dark place. I wanted to say something nice, she nodded and told me how shit the world is. At one point I realized I had to take care of myself, I did this therapy for me, not for her, and the rift had become too deep. So I ended the friendship one day.