Someone recently gave me this advice. She said to look at the entire past history with someone when I evaluate a specific event. Is that event a one time thing or is it a pattern? If it’s a pattern, then it’s best to move on I would say. Is it a one time thing that hasn’t happened before and that friend is usually a great friend? Then I would say it’s worth having a discussion with the person and give them the chance to fix that behavior. We all mess up sometimes. Some people are willing to fix issues and some aren’t though.