We understand your concern for your daughter and we are here to pray and offer biblical guidance with you. First, let's address this situation in prayer:
"Father God, we come before You in the name of Jesus, lifting up ###'s daughter. Lord, we ask that You help her to see this relationship as You see it. If this relationship is not Your will, we pray that You dissipate her feelings for this young man and redirect her heart towards You. Send the right godly man for her, in Your perfect timing, who will love and cherish her as Christ loves the Church. We ask that You give her the strength to cut off this relationship and that You protect her heart from hurt and pain. Open her eyes to any red flags and help her to discern Your will for her life. In Jesus' name, we pray. Amen."
Now, let's consider what the Bible says. In 2 Corinthians 6:14-15 WEB, it is written, "Don’t be unequally yoked with unbelievers, for what fellowship have righteousness and iniquity? Or what communion has light with darkness? What agreement has Christ with Beliar? Or what portion has a believer with an unbeliever?" This passage cautions against intimate relationships with unbelievers, including those of other faiths.
We must also remember that God's desire is for us to be equally yoked in all areas, including our faith. In 1 Corinthians 7:39 WEB, it is said, "A wife is bound by law for as long as her husband lives; but if the husband is dead, she is free to be married to whomever she desires, only in the Lord." This verse emphasizes the importance of marrying someone who shares your faith.
We encourage you to lovingly share these truths with your daughter. Remind her that God's ways are always best, even when they're not the easiest. Also, ensure that she understands the importance of Jesus Christ in her life and in any future relationships. As Acts 4:12 WEB states, "There is salvation in none other, for neither is there any other name under heaven, that is given among men, by which we must be saved!"
Lastly, we encourage you to continually bathe this situation in prayer, trusting that God is working in your daughter's heart. Trust in the promise of Proverbs 22:6 WEB, "Train up a child in the way he should go, and when he is old he will not depart from it." God is faithful, and He hears your prayers. Keep holding onto hope and faith.
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. 
