Really all you can do is work on your own mental health, continue your therapy and encourage her to start her own therapy. If that includes medication, then great.

Trying to get out all your problems while she is depressed is probably not helping. If some of those problems relate to your behavior then just make the changes and let her see them first hand.

Remember, you cant make a person change, you cant make her go to therapy or get well. Take care of yourself first and foremost, and encourage her to get help.