You can know you're a Christian if, not are you dealing with your sin before God but is God dealing with you about your sin.
Before I met Jesus I wanted to be a professional pool player.
What blame did Jesus have when He took the full blame for your sin?
Everyone loves winners. You look for things to praise with those you believe in.
Sin regardless of how you get there is a vulnerable and a dangerous place to be. Living in unforgiveness is living in an unsafe place.
Don't ever forget where God found you.