When we have done something wrong, and to me the only kind of "wrongs" that matter are the ones that have hurt another person in some way, we can't take it back but I think we can forgive ourselves. Just because we made a mistake does not mean we are a bad person if it was truly a mistake verses intentionally trying to harm another. Most of the mistakes I have made in my life were done against my true instincts--I was trying to please someone else, following a cultural norm, stupid office policies, that kind of thing. Constantly feeling bad about something you have done (unless you are still doing it) is a symptom of depression. We all make mistakes. Tell the person you are sorry once, twice, maybe three times then stop apologizing--just do nice things for them after that. Don't feel like if you made that mistake, you have ruined their whole life--we are not totally responsible for other people's happiness and success. That is up to each individual person. I totally believe in "free will" even when a person is harming themself (but they have no right to harm others). I know this advice is easier said then done but this type of thinking really has helped me overcome my depression. Good luck with all that you are going through. I know you are in pure agony sometimes.....