Matthew 3:8 Produce fruit in keeping with repentance.
If you are truly penitent, if you know what your sin is, if you are willing to repent, then do things which show you are!
It is one thing to talk about being sorry, but another thing to be sorry. Most people will see straight through you when you pretend to be sorry; especially God!
Just like a tree is known by the fruit it produces, so we will be known by the way we do things and the way we act.
Act like a Christian. Be a Christian!