Severly Depressed Friend

I'm a retired middle school teacher. Years ago, I had a bunch of students in homeroom come up to me and tell me about their friend who did not attend our school. Their friend had recently lost both of his parents, was depressed, and talked about suicide. I told them that next time he talked to them about suicide to all jump on him getting him in a headlock, arm lock, leg lock, and anything else and to let that person know how much they cared for him and if anything bad were to happen to him how it will break each of their heart. The next day they excitedly came up to me to let me know that my idea worked and to thank me. I explained to them that he was still mourning his parents and probably missing their love. They showed him that he was still loved and that they would feel miserable like him if anything bad happened to him.
I don't know the specifics of your friend's depression but I pray from the bottom of my heart that God will inspire you to do and say the right things to help your friend snap out of it. Don't give up on her , show her that she is not alone, that you care about her, and that if she turns to God for help and trusts in Him to be able to turn her life around, it will happen. She just has to persevere.

Just a suggestion: preach repentance for bad discisions and God's forgiveness of sins through belief in Jesus Christ. She can be made whole. All she has to do is believe and trust and then she will get the peace and security that she is looking for. Ask her to pray with you as you pray aloud expressing to God your gratitude for His mercy and grace which is given to us undeserving sinners. Thank Him for providing a way to joy and eternal life that comes from a sincere repentance of one's life , for forgiveness of sins through belief that Jesus' death paid for our sin nature, and for the rebirth that comes with being filled with the Holy Spirit which fills us with that same love that is shared by the Father and Jesus. This life is too complicated to just be happening randomly and our Creator has revealed Himself and His plan for the history of mankind through the Bible. The whole theme of the Bible is to Love God by accepting and believing His plan for the forgiveness of sins and experiencing the reprogramming of the heart when filled with love for God first, and then for our neighbors as ourselves second. These are the two Greatest Commandments: Love God and do everything with love in your heart. That includes your neighbors and yourselves.
I pray that Cairn15 's friend experiences the love of God which is the Holy Spirit reprogramming her heart to turn to God and experience that same love which is shared by all believers. I pray that the Father embraces her in His arms and guides her in her perception of what life is all about , that the God of the Bible actually exists and is active in each of our lives. Father , please baptize this young lady in your name and grant her the repentance that leads to the forgiveness of sins through the baptism in the name of the Son and that she will be considered perfect when standing before the Father because being baptized in the name of the Holy Spirit means born again with a new heart full of love for everyone including ourselves. Obeying the spirit of the law is a lot easier than obeying the letter of the law which is full of rules, ordinances, regulations, etc. Just make all your decisions with love in your heart and you will be obeying God's commandments.

I apologize if I seem long-winded. I just think about your friend and feel that the Holy Spirit is directing me to write this. I just want to help out of love.