In every problem there is always two side of a story.
No matter whose fault it is, we should listen to what they have to say. For example, you caught your boyfriend with another girl. Even if you're so mad, you should listen to why he did it. Give him the benefit of the doubt. There's always a reason why he did it. Maybe he found something with the new girl that you don't have. No matter how big his mistake is, you also have a problem. He won't do something bad if there is no problem with you. Don't wait for the time that you'll regret that you didn't listen to his side. Talk to him and listen. Any problem will be resolve if we'll just communicate. You don't what to have "what might have been" in your lifetime. So listen to what other's have to say because no matter how thin the slice is, there will always be two parts.
Who knows, you have the bigger part and you fail to listen.