When I was a teenager, I would always have an attitude with my grandparents. I was very rude to them and I really don't know why. Now, I have a good relationship with my grandparents. But, I still feel extremely guilty for how I acted. It's been noted that I've matured and grown up a lot, and I'm definitely not the person I used to be. How do I get rid of this crippling guilt and allow myself to forgive? I'm also concerned that my old friends who knew me during that time will think I'm a terrible person for how I used to act, since they don't know who I am today.