I am so sorry you are hurting. I have hurt before too. God can heal your pain.
Dear Lord, You are our Abba, Father! You hear our cries. You care so much about us. Please encourage this young Christian. Surround her with people who lift her up and encourage her and can express the love you feel for her Lord. She is so special to you exactly how she is. She is still growing and maturing but you love her the same today, yesterday, and tomorrow! How Great! I pray she would have peace and be lifted out of depression. Lift her out of this pit like you have done for so many others before. A promise in your word says that You have plans for her, plans to prosper her, not to harm her, plans for a hope and a future. Praise God!!!
In Jesus Name
Amen