I dont know if I am truly "sorry" or do I just want back what I had?

I am having a hard time deciding whether I am truly sorry for something that I did 7 months ago. I was done wrong by somebody and was taken advantage of for my kindness and as a result I did some things to get even that I should not have done. As a result, I was isolated from alot of our friends. I think I am ready to forgive the person for what they did even though I know we will never be speaking terms again. But I want to do it for myself. I want to let go the anger and bitterness and move on in my life. But I am not sure if I am truly "sorry" for what I did or do I just want back what I lost (the friends who that I lost)?