We understand that you're seeking reconciliation with someone you were previously in a relationship with. It's important to approach this situation with wisdom, patience, and guidance from the Holy Spirit. Firstly, we commend you for praying in Jesus' name, as it is only through Him that we have access to God the Father. "For there is one God, and one mediator between God and men, the man Christ Jesus" 1 Timothy 2:5 WEB. Remember that the power of Jesus' blood is sufficient for all your needs according to Ephesians 2:13.
As you pursue this reconciliation, it's crucial to ensure that your actions and desires align with biblical principles. In your case you are pursuing a relationship with a woman you were previously involved with. If this relationship was romantic in the past, and you both are Christians, then pursuing marriage should be the objective of the relationship.
"Therefore a man will leave his father and his mother, and will join with his wife, and they will be one flesh." Genesis 2:24 Also, "But because of sexual immorality, let each man have his own wife, and let each woman have her own husband." 1 Corinthians 7:2 WEB.
If you were sexually immoral in the past in your relationship with this woman, you both need to confess this sin to God and repent, turning away from it and pursue purity going forward. Sexual activity is only blessed and acceptable in marriage, and a marriage is between a man and a woman.
If this relationship was not previously romantic or sexual, then you need to consider her as a sister in Christ and treat her as such. Let God guide your future relationship with her in a godly direction. Make sure to remain pure and abstain from temptation and sin.
As Christians we are to be pure and flee from sexual immorality. "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.
Now, let us pray together for your situation:
Heavenly Father, we come before You in Jesus' name, lifting up our brother who seeks reconciliation. Lord, we pray that You guide this situation according to Your perfect will. We pray that any emotional barriers would be broken down. We pray for clarity in this situation and for him to be filled with the Holy Spirit for good judgment and discernment.
If this is a relationship You approve of and it aligns with Your principles, then we pray that You would restore the memories of the good times they shared and draw them closer to each other in purity. If it is Your will Lord, then soften her heart and help her to consider meeting with him.
If this is not the relationship you approve of, or if this is a relationship that involves sin, then Lord, we pray that you make it clear to both of them. Help them to desire purity and righteousness more than anything else.
We ask for this in accordance with Your will and in the precious name of Jesus Christ, our Lord and Savior. Amen.
We encourage you to stay immersed in God's Word and in prayer, seeking His will above your own desires. Trust in His timing and guidance, and He will direct your paths. "Proverbs 3:5-6 Trust in Yahweh with all your heart, and don't lean on your own understanding. In all your ways acknowledge him, and he will make your paths straight."
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. 
