When people are upset, sad, or angry, they vent their negativity on others. It affects their relationships and mental health. In contrast, when an individual is happy, they smile, talk politely, and spread positivity and optimism. They are likely to be more kind and helpful towards others. Since they feel good about themselves, they try to keep people around them happier. Being around a happy person makes an individual feel comfortable. Thus, you can have several healthy relationships with minimum conflicts if you are happy.