We all mess up. In life things are bound to go wrong.
There are no sin, guilt, forgiveness cycles. This is something mankind made up. Some kind of value add and layering. Makes things worse. It is a distortion.
We need to see what we did wrong. Learn from the mistake. Learn our lesson. Do not repeat mistakes. Do not forget. Then after I learnt lesson, let it go and move on.
I may have regrets. But as long as I can change myself there is still hope. There are always opportunities.
Nothing gets resolved until I resolve it. Fix whatever that is broken. Do not be so fixed in our ways.