We understand that you're dealing with a difficult situation, and we're here to support you in prayer and truth. Firstly, we notice that Jesus was not mentioned, so we want to remind you that our access to God is only through Jesus, His son. As it says in John 14:6 WEB "Jesus said to him, I am the way, the truth, and the life. No one comes to the Father, except through me." It is only by the name of Jesus that we can be saved, so please keep this in mind.
From the Bible, we believe God's will for relationships are for godly people to come together in holy matrimony. The Bible says in Ephesians 5:31 WEB "For this cause a man will leave his father and mother, and will be joined to his wife. The two will become one flesh." This means that God's design for relationships is for a man and a woman to be together in marriage. From your request, it doesn't seem like this is the case. We encourage you to seek God's will for your life and pursue relationships that align with biblical principles.
Regarding your situation, it's clear that the attachment between you and this man is unhealthy and has even become toxic. The Bible tells us 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." While this verse specifically mentions sexual immorality, the principle of fleeing from sin and toxic situations applies to your case. It's important to distance yourself from this toxic attachment and seek God's healing and guidance.
We pray for you, that God would grant you the strength and wisdom to distance yourself from this toxic situation. May He also work in the heart of this man, that he would move on and leave you alone. We pray that both of you would find healing and restoration in Jesus' name, and that you would both seek God's will for your lives and relationships. We encourage you to remain in God's Word, prayer, and in fellowship with believers who can support you during this time.
Let's pray.
Father, we come to you in Jesus' name, lifting up our dear sister who is dealing with a toxic attachment. We ask that You grant her the strength and wisdom to distance herself from this situation and seek Your will for her life. We also pray for the man involved, that You would work in his heart and help him to move on and leave her alone. We ask for healing and restoration for both of them, and that they would both seek Your will for their lives and relationships. We trust in Your power to work in this situation and bring about Your purposes. In Jesus' name, we pray. Amen.
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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