The only person to suffer from un- forgiveness is ourselves. Others can't feel nor read our thoughts, what we think and feel only we can get to grips with. If we are to move on in life and enjoy a lightness that's there for us we must forgive no matter what it is. Keeping malicious and evil thoughts is going to harm us no one else. Some people keep the past alive as if it is a validation for them and the future but what it boils down to is that you do not respect yourself nor others, you are in fact selfish and stupid and are a pain to everyone around you. It's like drinking poison and expecting others to die, it won't happen ever.