I know this feeling. It's hell when an apology isn't accepted. It's hell to not know if something will be used against you. It's hell to condemn yourself and be ashamed of what you've done.
I think the only thing that takes it away is time. After so long has passed, you realize that it doesn't matter. Everything is just castles in the sand waiting for the water to wash them away. If they don't have an effect on your life, then their opinions don't matter. Your life is your concern. Take care of yourself. That's what everyone else is doing it seems.
I guess, to realize a wrong shows the ability to do right. If someone can do harm, they can also do good. A person may not be good for everyone, but they can be good for someone. Forgiveness makes sense. I believe people do deserve to be forgiven. Even if all they can do is to apologise, this still deserves forgiveness for the fact that it affirms the line of what is right and what is wrong.
Personally, I wish I could move on. I wish I could take my own advice. My conscience is my hell. Due to many circumstances, I probably won't win my battle. I wish you would. I wish everyone could be happy. I don't hate the world, but I wish people would put more good in it. I wish I would put more good into it.
We are alone. We are all beggars. It is one thing to know the evil of the world. It is another thing to know the evil of oneself.
I had an epiphany once, and no matter what I do, I can never unlearn what I learned that day.
You can do this. Others have and you can too. I wish all the best for you.
I hope you find peace.