Hello , My advice to you is to continue being supportive and have a chat with her on your feelings and let her know you're here for her and are willing to do anything to help her cope with this; Keep in mind it will not be easy , some days she's gonna want to give up and give in to her disease as will you but as long as you talk her through it and continue to be that supportive backbone it will get easier , I do recommend her seeking counseling as well medication can only help so much .