How dear of you to ask for help for your friend.
I will be praying for you both!
"Sad One," from what you have written here has had a very rough time, and understandably so. Although these experiences can be extremely devastating, we do have hope for healing and for recovery. A daily, living relationship with Him can heal like no other!
I'll be praying for you, as well. You are affected by this. Additionally, He can give you additional strength and wisdom as you deal with not only your life, but also with "Sad One"... and in other relationships.
As you commune with Him, you will feel infused with His love, His hope and He will grant you strength and wisdom whenever you are in need.
Glad you have posted and have asked for prayer since you feel led to do so!
May His will be done.
Many Blessings!