And you're afraid to start another, concerned that the same thing will only happen again. These experiences show relationships in trouble. In these challenging, stressful times, the relationship honeymoon does not last long. When your existence is already scheduled to the hilt, how do you still feed your marriage so that it does better than barely survive. In the beginning of a relationship, attraction comes easily.
Interest comes easily.
So do hope and optimism. Unfortunately, the skills needed for long-term success do not come easily. Authors talk to you, but you can't talk back. Counseling can help, but it can be expensive. You could talk with other couples about your relationships.