If we're hiding something we need to bring it to the light of day. That may require admitting to yourself that you have actually done something wrong and truly sinful. (If so, join the club! All have sinned and fall short of the glory of God.) You might need to speak with a pastor or someone you can fully trust in order to get it off your conscience. You surely must say it to God. I've found it helpful to write it out. I've done so, and afterward destroyed the document as a means of actively reflecting the reality of confession and forgiveness.
God removes sin from us as far as the east is from the west. We more fully realize this when we admit it and confess our sins out loud.
