Being sorry but not being sincere is useless. It will only make you do the same mistakes over and over again. So if you are really sorry, say it like you means it. And remind yourself not to hurt someone’s feeling again.
We all make mistakes, we all make the wrong choices, but we move on… And we learn from our mistakes.
If people refuse to look at you in a new light and they can only see you for what you were, only see you for the mistakes you’ve made, if they don’t realize that you are not your mistakes, then they have to go.