Your letter has been read with much prayer and heaviness of heart, and I thank you for the honesty with which you have opened your soul.
You tremble under a burden of guilt, and you desire forgiveness, and to such a soul the Word gives a blessed whisper which I would have ring in your ears, There is forgiveness with God. Not a forgiveness that you can bargain for or purchase by your own act of separation, but a divine forgiveness, surprising and complete, wrought by Christ Jesus who died, the Just for the unjust, that He might bring us to God. He forgives not because the sinner has made himself worthy, but for His own sake, and for the sake of His dear Son. If by faith you trust the matchless Atonement which covers all your guilt, then you are even now among the blessed. The Lord drowns all the hosts of sin in the depths of the sea and the whole of your guilt is swallowed up forever. This is no partial pardon, but a full and eternal forgiveness. The gifts and calling of God are without repentance. He does not forgive and afterwards accuse.
You confess that you entered this union knowing it was not according to the Lord, being rebellious and unequally yoked together with an unbeliever. Hear the Word, Be ye not unequally yoked together with unbelievers. You thought the yoke of Christ was hard when it called you to abstain from such a path, and you have found since how much harder is the yoke of disobedience. To turn from that path was right, for obedience is required of us, but not as a bargain to move the hand of God. You hoped that by breaking the bond God would spare the man from sickness, yet the Lord is not to be bargained with as a creditor who will remit a debt if we offer Him terms. He is sovereign over sickness and health, and we must not lay to His charge that He sent cancer as a direct punishment for this sin, nor must we think that our act of separation could compel His mercy. Sickness in this fallen world is part of the groaning of creation, and while all affliction should lead us to search our hearts, we must leave judgment and healing in His wise hands and not interpret His providence beyond what is revealed. What He does require is a broken and contrite heart that confesses all its guilt and humbles itself in His sight, seeking no cover of guile.
And here is the gracious link, when the Son removes guilt, the Spirit removes guile. While guilt remained unconfessed you put a fearful strain upon your conscience to hush its protests, but now the Lord would have you forsake guile as well as seek forgiveness. That means plain dealing with God and with yourself. You cannot hope to obtain peace while you continue in iniquity. Can a soul find joy in God who still clings to the very sin which grieved Him. If you have truly turned from sexual immorality, which belongs only within the lifelong covenant of marriage between one man and one woman, then turn from it altogether in heart and deed. Do not keep a door open to it through lingering romantic entanglement.
This brings me to the great pain you now bear regarding this man. You love him and you would do anything for him, and you wish to believe he is good despite what you rightly name as manipulative and psychologically abusive ways. I must speak plainly in love. To excuse such cruelty as mere trauma or behavioral trouble is itself a form of guile which keeps the conscience from seeing things as they are. All of us are fallen and in need of Christ, but abuse is not to be minimized or borne as a proof of love. To offer yourself again and again to one who wounds you and then spreads a false narrative about you is not kindness to him nor faithfulness to God. Scripture calls us to forgive as Christ forgave us, freely and from the heart, and to desire the salvation of those who have wronged us, but forgiveness does not require that you place yourself again under a yoke that is both unequal and harmful, nor that you maintain a close friendship which opens the way to further sin and hurt.
You ask that God would make him a Christian so that you could be together. I understand the longing, yet we must not pray that God would save a soul merely to grant us our desire for a relationship, nor ask Him to bless a union that was formed in disobedience. We may and we do pray earnestly for his salvation, because salvation through Jesus Christ alone is his deepest need, whether you ever see him again or not. Pray for him, that the Lord would open his eyes to his own sin and to the mercy that is in Christ, that he might repent and believe and live. Pray also for yourself, that you may be kept chaste and whole, and that if the Lord in His providence should ever bring a godly marriage into your life, it may be entered upon in holiness and in the counsel of the church, not in the heat of old affection.
What then shall you do. First, come anew to Christ and believe in the forgiveness of sins for yourself, not in general but for your own rebellion and impurity, trusting His blood alone. Second, walk in the light with no guile, confessing fully and forsaking the sin, and seeking the help of faithful pastors and mature believers who can know you and counsel you face to face. If you are in danger or subject to manipulation, seek that counsel at once and set firm boundaries, including distance from this man and from private communication with him. It is wise for all care for him now to be committed to others and to the Lord, not to your own hands. Third, learn the way of Christ in forgiveness. He forgives in a continuous manner and does not afterwards accuse, and He calls you to release this man to God, to pray for him without bitterness, and to leave vindication to the Lord when untrue words are spoken about you.
Let me pray for you now as you have asked.
O Lord, our God, with whom there is forgiveness that Thou mayest be feared, look upon this Thy child who mourns her sin and her sorrow. Grant her to know with certainty that her sins, though many, are forgiven for Christ's sake, and that this forgiveness is present and eternal. Take away guilt by the blood of the Lamb and take away guile by Thy Holy Spirit, that she may walk in truth and chastity and find rest. Heal her wounded heart and guard her from returning to a yoke Thou hast forbidden. Have mercy upon the man of whom she has written, and if it be Thy will, bring him to repentance and faith in Jesus Christ, for his soul's salvation and for Thy glory alone. Give her wisdom, protection, and holy company, and keep her steps in Thy way until Thou dost bring her into perfect peace. For Jesus sake, Amen.
Abide under faithful preaching and in the fellowship of the saints, and let the Word dwell richly in you. There is forgiveness, dear soul, and where that forgiveness is truly received, a new life follows after it.