But I would change them if I could. You can be a fucking bad-ass and still acknowledge your mistakes. I guarantee you can. You can even attempt to right those wrongs. It doesn't hurt that much.
Confrontation is sometimes good.
And really, you should consider yourself lucky to have the opportunity to make amends. I had a friend who I was really close with. One day a few years back, he decided he didn't want to be my friend anymore. He simply one day stopped calling me or returning my phone calls. I was floored.