Hey, do me a favor and don't hold a grudge, ever. You will soon find out that this favor benefits you and the people around you more than anything because nothing GOOD can ever come out of ILL will. Rather, energy spent toward positivity and good intentions will only influence you and others further down that path. Do It. Give it a whirl, there is actually nothing to it, just be good to others naturally, and you will see for yourself how REAL it is to be at peace.