Good relationships play a significant role in our happiness and well-being. According to a psychologist, about 40% of our happiness is within our control, which includes how our relationships are going and our ability to improve them. The remaining 60% is influenced by factors such as innate temperament (50%) and current life circumstances (10%). This suggests that while we have some control over our happiness, a significant portion is determined by factors beyond our control. Overall, relationships have a substantial impact on our overall happiness and should be considered as an important aspect of the 'good life'.