Confront means either to face a situation that makes you uncomfortable, or to say something to someone about something they've done that bothers you. Rather than letting things go, when people are rude to you you should confront them.
Confront derives from the Latin con- "with" and -front "front." You can confront a sad truth, you can confront a person by calling them on their behavior, you can confront someone with the fact that they have terrible breath. You can be confronted, too—on the trip through the mountains, we were confronted by the impassibility of the road.