Never respond to rudeness. When people are rude to you, they reveal who they are, not who you are. Don't take it personally be silent. For more quotes and inspirations: http://www.lifehack.org/articles/communication/never-respond-rudeness.html?ref=ppt10
I don't consider what I hold a grudge. What I think is if I try more than once to ignore rude people and it gets to the point where I want nothing to do with them because of who they portray... I remember all of the rude things it's not a grudge it's facts and evidence of why I can't have anything to do with people who are rude and self absorbed.