Forgiveness does not mean that we forgive the act perpetrated, but rather, that we forgive the imperfection that lies within most of us. It is also about recognizing the potential for change.
With this view, even if the person does not regret his action and does not seem to be changing his attitude and behavior, forgiveness is still possible.
Forgiveness is acknowledging that the wrongdoer’s mind and being is unwell, and considering that person like a physician would treat a crazy patient, with caution and care, and without any hatred.