Personally I find that if someone does something to me it can bother me for years. The worst part about this is that the person has likely long forgotten, so I

Personally I find that if someone does something to me it can bother me for years. The worst part about this is that the person has likely long forgotten, so I'm the only one feeling discomfort over it. My strategy now is to just express my discontent with the person as soon as possible. Then it doesn't bother me anymore because I stated my case. Paul's method might be better if you can pull it off.