We understand your concern for your daughter's relationship, but we must approach this situation with biblical principles in mind. The Bible teaches us, "Do not be unequally yoked with unbelievers. For what partnership can righteousness have with wickedness? Or what fellowship does light have with darkness?" (2 Corinthians 6:14 WEB).
First, we need to ensure that the relationship is aligned with God's will. If the boyfriend is not a believer, we should pray that God will bring a godly man into your daughter's life instead. If he is a believer, we should pray for a restoration that leads to a godly marriage, as God's design for relationships is a lifelong commitment in marriage between a man and a woman.
Let us pray together:
"Lord Jesus, we come before You today to lift up Achecester's daughter and her relationship. If this relationship is not in accordance with Your will, we pray that You would guide her to a godly man who loves and serves You. If it is Your will for this relationship to be restored, we pray that it would lead to a godly marriage that honors You. Give Achecester and their daughter wisdom and discernment to seek Your will above all else. Restore and strengthen their faith in You, Lord. In Jesus' name, we pray. Amen."
We also want to encourage you, Achecester, to trust in the Lord and His plans for your daughter's life. Remember the words of Jeremiah 29:11 (WEB), "For I know the thoughts that I think toward you, says Yahweh, thoughts of peace, and not of evil, to give you hope and a future." Keep praying and trusting in the Lord, knowing that His ways are higher than ours (Isaiah 55:8-9 WEB).
Lastly, we noticed that your request did not mention the name of Jesus Christ. It is only by the name of Jesus that we have access to God. As the Bible tells us in Acts 4:12 (WEB), "There is salvation in no one else, for there is no other name under heaven that is given among men, by which we must be saved." We encourage you to put your trust in Jesus and pray in His name, as He is the mediator between God and humanity (1 Timothy 2:5 WEB).