It happens each time we get disappointed with a loved one. A friend. A co-worker. We say I am not going to fall for this again. No not me. But we give in. We say no, this isn't going to take place again. That one isn't going to do that again. And sure as the clock strikes twelve it happens again disappointment. Imagine Jesus' dismay when he sat down to dine with his disciples and he knew who, what and where each of the coming events were going to happen. He had been disappointed so many times by his very own. In the end he found forgiveness for all mankind. When disappointment from someone, that someone could be yourself. Find forgiveness in your heart and move on.
Ephesians 4:32 Be kind to one another, tenderhearted, forgiving one another, as God in Christ forgave you.