We believe that when we sin, we go to a priest and confess that sin. The priest absolves the sin. Then we accept the forgiveness of God through the priest. We are to sin no more and if we fall we go again to confession. God doesn’t care how many times we go or how many times he will forgive us if we have true contrition. You may be holding on to the sin, you may be holding on to the guilt. Just remember how much God loves you and wants you to be whole again. You cannot be close to Him if you let this come between you and He - you must have nothing before Him. Other posters will explain this better than my attempt. God bless you.