Firstly, we are here to pray and counsel you according to God's will and His Word. We notice that your prayer request did not mention our Lord and Savior Jesus Christ. It is only through Him that we can approach God the Father, and there is no other name by which we can be saved Acts 4:12 WEB
Neither is there salvation in any other, for there is no other name under heaven that is given among men by which we must be saved!
Now concerning your issue, we will address what you've shared, and provide biblical guidance. You asked for restoration of a relationship. We do not know if this is a dating relationship, an engagement, or a marriage. We also do not know if this other person is a Christian believer. These are important details.
We are instructed in God's Word not to be unequally yoked. 2 Corinthians 6:14 WEB Do not be unequally yoked with unbelievers, for what fellowship have righteousness and iniquity? Or what fellowship has light with darkness?
If this person is not a Christian believer, then you need to stop pursuing a relationship with them as a Christian should only marry another Christian believer. If they are a Christian believer, then you need to be in a group fellowship setting with other Christian believers and not isolated with them. You need to do things properly for the relationship to be honorable. If this is a marriage, then you need to be willing to forgive and restore the relationship.
A relationship between a Christian believer and an unbeliever is rebellion against God. If this is a romantic relationship and not a marriage, then it is not to be restored. 1 Corinthians 7:8 WEB But I say to the unmarried and to widows, it is good for them if they remain even as I am.
Now, let us pray together.
Heavenly Father, we come before You in the name of Jesus Christ, thanking You for Your loving kindness and mercy. Lord, we pray for this dear one and their relationship. We pray that Your will be done here. We do not know the details, but You do. If this is a marriage then we pray for reconciliation, forgiveness, and restoration. Lord, if this person is an unbeliever, then we pray for their salvation and conviction of their need for You as their Lord and Savior. But help this dear one to do what is right and honorable, fleeing temptation. Help them to take captive every thought to make it obedient to Christ. We pray for You to heal their broken heart and bind up their wounds. In Jesus' name, we pray. Amen.
If this was a romantic relationship and not a marriage, then you need to repent of this and stop pursuing it. You need to get back into fellowship with God. You need to be praying about this as this is sin and not God's will for your life.
Psalm 34:18 WEB Yahweh is near to those who have a broken heart, and saves those who have a crushed spirit.
Bring God into this and stop trusting in your own understanding.
Proverbs 3:5 WEB Trust in Yahweh with all your heart, and do not lean on your own understanding.