You are safe, Vix. That person in your head is the negative side of you. It's telling you the things you don't want to hear because it's a construct of mental guilt.
As soon as you realize that what you did was wrong, and that people will forgive you if you ask and show that you've changed, i'm sure that they'll get you back on their side.
For now, however, ignore the voice. I know, it'll be hard at first, but get into the habit of hearing it, and then pretending like it didn't happen in the first place.