That is the enemy trying to make you lose faith and make you think Jesus will never forgive you. Jesus loves us even when we were still in sin, all you have to do is really repent and he will forgive you. Turn away from you sins and give God the honor and the glory for washing you in the blood of the Jesus and make you as clean as fresh clean snow. Just talk to God in Jesus name and let him know how you feel, and to give you the peace you need and strength to continue loving Him.
Lord help this person accept your forgiveness and to forgive them self too. Direct their steps closer to you as you make their faith and love for you stronger. I pray in Jesus name amen.