There are things that weigh as much as old hurt and offenses transported days after days in human being life. But if you want to feel or enjoy your time with other people, all you have to is get off that Kind of stuff.
You can't always keep the old scores or wrong and still expect people to make relationship with you right. If somebody had offended or hurt you, all you need to do is address it and get it solved on round table, then do it right away. Please resolve all the issues and forge ahead and if you think is not worthy of been discussed, don't bother to bring it up. Forget it and let move on.