Regret or remorse of the wrong we have done should be in a positive spirit of changing, turning towards God with humility.
The essence of spiritual life is simply to use our free will properly.
If someone takes responsibility without force, that is love.
When there is love in our heart, only love will come out.
If we do the right thing with right intent that is actually our success.
Opportunities are always there for us to grow, opportunities are always there for us to come closer to each other & come closer to God; if we just look for them.