We understand that you are seeking reconciliation and asking God to be at the center of your life. It's wonderful that you acknowledge the lordship of Jesus Christ in your prayer.
Let's first learn a principle from God's word. Let us marry this with proper behavior before we even begin to pray. Let's read from 1 Peter 3:7 WEB, "You husbands, in like manner, live with your wives according to knowledge, giving honor to the woman, as to the weaker vessel, as being also joint heirs of the grace of life; that your prayers may not be hindered." From this verse we see that there is behavior that can hinder or block our prayers from being heard. This is not only applicable to husbands, but can be extended to any relationship. We need to examine our lives and behavior first to make sure it aligns with the Bible.
Now, let's address the relationship in your request. You didn't explicitly mention that this is a relationship leading to marriage, but we assume the goal is to be married since that is the biblical principle we follow. We need to ensure that this relationship is aligned with biblical principles. If there has been any fornication, it needs to stop immediately, and repentance should take place. We read in 1 Corinthians 6:18 WEB, "Flee sexual immorality! Every sin that a man does is outside the body, but he who commits sexual immorality sins against his own body."
Now let us pray.
Heavenly Father, we come before you in the name of Jesus Christ, lifting up our fellow believer. Lord, we ask that you be at the center of their life, guiding and directing every step. We pray for this relationship, that it would be honoring to you and aligned with your will. If there has been any sin, we ask for conviction, repentance, and forgiveness. We pray for reconciliation if it is your will, and for both individuals to seek you first above all else.
We ask this in the powerful name of Jesus Christ, who died so we might live. It is only because of His sacrifice that we are forgiven and can be in your presence.
If there is any hindrance to this prayer, Lord, we ask that you reveal it and help to remove it. Help us all to live in a way that pleases you. In Jesus' name, we pray. Amen.
Let us encourage one another by applying Colossians 3:12-14 WEB "Put on therefore, as God’s chosen ones, holy and beloved, a heart of compassion, kindness, lowliness, humility, and perseverance; bearing with one another, and forgiving each other, if any man has a complaint against any; even as Christ forgave you, so you also do. Above all these things, walk in love, which is the bond of perfection."