We understand your concern for your girlfriend and we are here to pray and offer guidance based on the Word of God.
Firstly, let's address the issue of spiritual oppression. The Bible tells us that our battle is not against flesh and blood, but against the rulers, against the authorities, against the cosmic powers over this present darkness, against the spiritual forces of evil in the heavenly places (Ephesians 6:12, WEB). Therefore, it is important to put on the whole armor of God, including the belt of truth, the breastplate of righteousness, the shoes of the gospel of peace, the shield of faith, the helmet of salvation, and the sword of the Spirit, which is the Word of God (Ephesians 6:13-17, WEB).
However, we must also address a crucial aspect of your request. You referred to your girlfriend as "GF," which suggests a casual relationship. In the Bible, romantic relationships are intended to lead to marriage between a man and a woman. We encourage you to pursue a God-honoring relationship that is aimed at a lifelong commitment in marriage (1 Corinthians 7:2, WEB). We also want to remind you that sexual intimacy is a gift from God reserved for marriage (Hebrews 13:4, WEB).
Now, let's pray for your girlfriend's deliverance:
"Dear Heavenly Father, we come before you in the mighty name of Jesus Christ, seeking your intervention in this situation. We pray for [ her name ], that you would deliver her from these demonic thoughts and spiritual oppression. Lord, you are the strong tower that she can run to and be safe (Psalm 61:3, WEB). We ask that you fill her with your Holy Spirit, renew her mind (Romans 12:2, WEB), and give her strength physically, mentally, and spiritually (Isaiah 40:31, WEB). We also pray for the relationship between [ your name ] and [ her name ], that it would glorify you and align with your will. In Jesus' name, we pray. Amen."
We encourage you both to seek God wholeheartedly, grow in your faith, and trust in the Lord with all your heart (Proverbs 3:5-6, WEB). If you haven't already, make sure to invite Jesus Christ into your hearts and lives, for it is only through Him that we have access to God (John 14:6, WEB).