...when regret is sincere, an apology to another
need not be accepted.
Seek to speak purely from your heart. When you have
made a mistake, erred as all humans do, admit it, feel
your regret as your inner truth, share it with those who
matter in the incident, and ask forgiveness. But do not require
it in order to move on in peace.
Another person's forgiveness is not what is needed.
Only your own. If the distress you caused was
unintentional, say you are sorry, then hold in a place of
love for those who will not forgive you. It may be a larger
hurt they are healing.