Most Helpful Guy
People cheat because they think either consciously or subconsciously another person is responsible for their happiness. People need to realize that their unhappiness stems from choices they have made and from not searching for a more meaningful existence. We are a society that has moved up Maslow's heirarcy of needs so high that we no longer worry about food and shelter, instead we long for self-actualization and fulfillment, which we wrongly blame others for if we can't figure out how to get it ourselves. Fundamentally, we marry people who are not suited to help us achieve these goals and we find ourselves searching for more people to guide us to this even though more often than not those people will also unknowingly misguide us as well.