I think it is time for your to look into getting professional help for your friend. You will be doing her a favor and yourself a favor.
I have a special needs child. I was able to recognize that my son needed help. I knew I had done all I could for him, and then we brought in professionals to help him. He is making progress because of that. We did it early on, but it has taken years for him to get to the point that he is in today. The help of professional and prayers to Our Lord have helped our boy. We have sadly watched as parents have not gotten their children the help that they need because they believe that they can help their child. A parent, even if they were the best in the field of whatever help their child needed, would not be able to help their child as an objective professional would.
My thought is that the Lord put health professionals on His green earth for a reason, and the miracle you wish for will be found when you let professionals intervene for your friend. Please call your local health facility, and ask to speak with someone in their psychiatric unit. Your friend will find the help she needs from a professional.
I will continue to pray for you and your friend. I trust in God that all will turn out well.
Heavenly Father, in faith, I thank You for the miracle You are already performing for these two friends. Amen.
Please let us know what happens. First thing, though, pick up the phone, and call the psychiatric unit of your local health institution. She absolutely needs their help.