This questioner says: In private, I am afflicted by sins.
Is there any advice for this?
Repent. You must repent. Fear Him.
"Indeed, those who fear their Lord unseen will have forgiveness and great reward."
Unseen means away from people.
They fear Allah when they are seen, and they fear Allah when hidden.
Because they are not concerned with people, but with Allah ﷻ. Yes.