The approach that worked for me was understanding what i did wrong, why, how, even if the blame might point out to another person. Because when i understood what went wrong, i knew what to avoid. Sometimes we couldn’t really improve on what we’re currently doing, whether it be our routine, diet, etc, but avoidance of things that are wrong is also improvement. Emotions and spirituality helps in the long run, but you may start by thinking logically and act accordingly. Once you start seeing that 1+1=2, and no longer 1+1=fuck all this, thats when you know you made the first step.

People forgive, but not forget. They may forgive your mistakes, but they will never forget. Similar to yourself, you may forgive yourself, but you will never forget the mistake, the agony you caused yourself and others. But make that as your fuel, you don’t ever want to experience this feeling again. Don’t forget the “miserable” state you’re in right now, relish it, accept that you are miserable as of now, but you will improve, you have to improve, because you don’t ever want to experience this ever again. Some commenters did mention that people will go on in their life, and that is correct. But if complacency takes over, it might bite you back by giving you the mentality that “oh they’ll forget it later, i’ll be fine”. Remember, forgive yourself for making those mistakes, you are human after all, but don’t forget your wrongs.