What is the difference between repentance and saying you're sorry? Is there even a difference?
I believe there is.
Saying your sorry is looking to the past. It's saying that you regret doing something. "If I could do it all over again..."
When you repent you are looking ahead to the future. You consider the present in light of your past.
Repentance is not mourning over what could have been it is deciding what will be. When you turn from something you begin to walk in the opposite direction.
No regrets, only resolve.