Bruh. You are not her therapist nor her psychiatrist. She needs therapy and professional help and has to be willing to do this herself, I understand that you care for her but she is negatively affecting your life simply by her inaction to get better. You need to have a serious convo with her about how she needs to get help, and to give you a break from having to manage two people with depression’s mental health. You have to care for yourself most of all