Understand that there is nothing you can do to “keep someone faithful." But you can help keep them committed. Relationships often fall short due to a loss of commitment. Even a faithful man may loose his desire to stay committed to the relationship, as there is a big difference between being faithful and being committed. Being faithful means staying dedicated to our agreement; being committed means staying dedicated to our future. A committed man won’t stray, as they are invested in the future of the relationship and that takes precedence over everything else, including momentary satisfactions. So, if you want to keep your man faithful, focus on keeping them committed to the future.