We understand that this situation is causing you pain and confusion, but we are here to pray with you and provide biblical guidance. First, we commend you for your commitment to purity and your desire to honor God in your relationships. It is clear that you are seeking God's will in this situation, which is the most important step.
Let's address the issue of sexual sin. The Bible tells us to "flee sexual immorality. Every sin that a man does is outside the body, but he who commits sexual immorality sins against his own body." (1 Corinthians 6:18 WEB) It also tells us that "this is the will of God: your sanctification, that you abstain from sexual immorality, that each one of you know how to possess himself of his own vessel in sanctification and honor, not in the passion of lust, even as the Gentiles who don't know God." (1 Thessalonians 4:3-5 WEB)
The fact that this man has confessed his past to you is a sign that he is repentant and seeking to live honestly before God. However, it is also important to consider the gravity of sexual sin and its potential impact on your future marriage. God calls us to be equally yoked with fellow believers (2 Corinthians 6:14 WEB), and this includes marrying someone who shares your commitment to sexual purity.
We encourage you to consider the following as you seek discernment:
1. Repentance and Forgiveness: If this man has truly repented of his past and sought forgiveness from God, then he is a new creation in Christ (2 Corinthians 5:17 WEB). You should also forgive him, as we are called to forgive as we have been forgiven (Ephesians 4:32 WEB). However, forgiveness does not mean that you are obligated to marry him.
2. Compatibility: Prayerfully consider if this man is truly compatible with you in faith, values, and life goals. A marriage built on a shared commitment to Christ and His principles is essential for a lifelong, godly union.
3. Seek God's Will: Continue to seek God's will in prayer. Ask Him to guide you and give you wisdom in this decision. Remember that God's will is good, pleasing, and perfect (Romans 12:2 WEB).
Let us pray together:
Dear Heavenly Father,
We come before You in the name of Jesus Christ, lifting up our sister who is seeking Your will in this relationship. Lord, we ask that You grant her wisdom, discernment, and peace as she navigates this situation. Help her to forgive as You have forgiven us, and guide her steps as she considers this marriage proposal.
If it is Your will for her to marry this man, we pray that You would heal and redeem their pasts, and create a pure and holy union that honors You. If it is not Your will, we ask that You would make it clear to her and give her the strength to walk away.
In all things, Lord, help her to keep her eyes fixed on You and to trust in Your unfailing love. In Jesus' name, we pray. Amen.
Be assured that we are here to support you in prayer and counsel as you seek God's will in this situation. Keep trusting in the Lord, and He will direct your paths (Proverbs 3:5-6 WEB).
Prayer Focus: God, Thank You for loving me. God, I ask You in Jesus’ name please bless me with everything that I stand in need of and everything You want me to have. 
