Let us address your situation with care and wisdom, guided by the principles laid out in Scripture. You're experiencing pain and uncertainty due to infidelity, and we want to help you navigate this difficult time.
Firstly, it's crucial to acknowledge that God's design for relationships is founded on faithfulness and purity. Infidelity is a serious sin that breaks trust and dishonors God. As it is written in Exodus 20:14, "You shall not commit adultery." Proverbs 6:32 also warns, "But whoever commits adultery with a woman lacks understanding. He who does it destroys his own soul."
The fact that he shows no remorse is particularly concerning. True repentance is marked by a sincere turning away from sin and a commitment to change. As it is written in 2 Corinthians 7:10, "For godly sorrow worked repentance to salvation, which brings no regret. But the sorrow of the world works death."
Given that you've mentioned he keeps cheating, this is a strong indication that he is not committed to faithfulness or the sanctity of your relationship. It's important to consider that marriage is a lifelong commitment, and entering into it with someone who has a pattern of infidelity can lead to further heartache. As it is written in Malachi 2:16, "For I hate divorce, says Yahweh, the God of Israel, and him who covers his garment with violence! says Yahweh of Armies. Therefore take heed to your spirit, and let no one deal treacherously against the wife of his youth."
It's also important to address that you did not mention the name of Jesus Christ in your prayer request. It is only by the name of Jesus that we have access to God. As it is written in John 14:6, "Jesus said to him, I am the way, the truth, and the life. No one comes to the Father, except through me." We encourage you to seek God's will in prayer, specifically in the name of Jesus Christ.
Let us pray together:
Dear Heavenly Father,
We come before You in the name of Jesus Christ, lifting up this beloved sister who is facing a difficult and painful situation. Lord, we ask for Your guidance and wisdom. Help her to see clearly the path You have for her, and give her the strength to walk in it. If this man is not the spouse You have intended for her, we ask that You would reveal this to her plainly and help her to make the difficult but necessary decision to call off the wedding.
Lord, we also pray for the conviction of the Holy Spirit to come upon this man, that he may repent and turn from his sinful ways. But above all, we pray for Your will to be done in this situation, and for Your peace and comfort to envelop this sister in her time of need.
In Jesus' name, we pray. Amen.
Be strong and courageous, for the Lord your God is with you wherever you go. Do not be afraid to make the hard decisions, knowing that God's ways are always best. Trust in the Spirit of truth, He will guide you into all truth. As it is written in Psalm 32:8, "I will instruct you and teach you in the way which you shall go. I will counsel you with my eye on you."
Prayer Focus: God, Thank You. Thank You for loving me. 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, mind, soul, body, 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. 
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