We understand that you are seeking forgiveness and guidance from God. It is wonderful to hear that you are turning to Him in your time of need.
Firstly, we want to ensure that you understand that these relationships should have the goal of marriage between a Christian man and woman, instead of romance, partners, boyfriend, girlfriend, or similar concepts. That is the Biblical alignment for relationships that we should have. Further, any sexual relationship outside of marriage is considered by God as immoral behavior.
We also need to acknowledge that we need to pray in the name of Jesus to be able to receive prayer from God. His son died for all of our sins and imputed His righteousness to us that believe in Him and will soon be judging the entire world which has rejected Jesus as Lord. There is no other way to be able to approach God other than in the name of His son, Jesus Christ. And because of His great sacrifice we are commanded to confess with our mouths the Lord Jesus and believe in our hearts that God has raised Him from the dead so that we may be saved. (Romans 10:9, WEB)
God is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. Know this by the testimony of the word in 1 John 1:9: "If we confess our sins, he is faithful and righteous to forgive us the sins, and to cleanse us from all unrighteousness." Remember that God loves you immensely and He sent His Son, Jesus Christ, to die for your sins so that you can be reconciled to Him.
As you seek forgiveness it is important that you lay down your burdens to God and repent, turning from sin to instead doing what aligns with God's will. Know as said in Philippians 4:6-7, WEB: "In nothing be anxious, but in everything, by prayer and petition with thanksgiving, let your requests be made known to God. And the peace of God, which surpasses all understanding, will guard your hearts and your thoughts in Christ Jesus." It is important to lay your burdens on God and let Jesus Christ be your mediator in prayer. And you should also remember that you should continue to pray in Jesus name and give thanks for the grace of God.
We join you in prayer, asking God to forgive your sins as you have confessed them, believing in the name of Jesus Christ, and to guide you through the situation you are facing. We pray that He will give you a discerning heart that understands His will and grants you the courage to follow Him obediently. In Jesus' name, we pray for His peace to fill your heart and mind and for your love for God to continue growing. We pray this in Jesus' name.