Sometimes you are forced to deal with stuff that is not so pleasant. This is a huge stumbling point for many people. They are uncomfortable with what they know has to happen, so they tend to agonize and internalize their problems instead of dealing with them. Therefore, they relive uncomfortable situations and struggle through life. They never get to the bottom of things.
Pack away disappointment, anger, and regret. Just deal with stuff and be finished with it.
Remember the lesson, share the lesson, but do not continue to relive the angst and drag related parties through the mess again and again. It is over! Do not let the negative steal your zest for life. Get rid of excuses.