We are truly grateful for your heartfelt concern for your girlfriend and her struggles. It is wonderful to hear that she has been a significant influence in your life, and we stand with you in praying for her salvation and freedom from addiction and depression.
Firstly, let's remember what the Bible says about salvation: "If you will confess with your mouth the Lord Jesus, and believe in your heart that God raised him from the dead, you will be saved. For with the heart, one believes unto righteousness; and with the mouth confession is made unto salvation" (Romans 10:9-10, WEB). We pray that your girlfriend will come to know Jesus personally and experience the transformative power of His love.
Let's pray together:
"Dear Heavenly Father, we come before You today to lift up our dear sister, who is struggling with addiction and depression. We ask, Lord, that You reveal Yourself to her in a powerful way, that she may come to know Jesus as her personal Lord and Savior. Break the chains of addiction and lift the heavy cloud of depression, Father, that she may walk in the light of Your love and grace. We also pray for wisdom and strength for our brother, that he may be a godly influence and support to her and her children. Help him to love her as Christ loves the Church, and to be a beacon of hope and encouragement. In Jesus' name, we pray. Amen."
We also want to encourage you to be a source of spiritual strength and guidance for her. Remember, "Husbands, love your wives, even as Christ also loved the assembly, and gave himself up for it" (Ephesians 5:25, WEB). While you are not yet married, the principle of loving and leading spiritually applies. Guide her towards Christ, pray with her, and encourage her to seek God's will for her life.
Lastly, we want to address that while your love and concern for her are evident, we encourage you both to consider the sanctity of marriage as outlined in the Bible. As you continue to support and love her, let your relationship be one that honors God and is guided by biblical principles.
Keep trusting in God, and remember, "With God all things are possible" (Matthew 19:26, WEB). Stay strong in your faith and continue to be a light for her and her children.
Prayer Focus: God, Thank You for loving me. Thank You for loving me, Jesus. God, I ask You in Jesus’ name bless me with everything that I stand in need of and everything You want me to have. Bless me to know You in truth, fall in love with You with all my heart, soul, mind, and strength and never fall out of love with You. Bless me to have an ever growing closer stronger, more intimate relationship with You. Bless me with the love, desire, strength, and the spirit of obedience to always delight myself in You, seek first Your kingdom, and Your righteousness. Help and strengthen me God to always respect and obey You. Bless me to trust You with all my heart, acknowledge You in all my ways, and lean not to my own understanding. 
