Taking responsibility for others’ happiness is a big cause of anxiety (Anxiety Causes: What Causes Anxiety?). People who are highly sensitive, caring individuals naturally want the people in their lives to be happy, to experience wellbeing. Caring for others is a character strength. However, it can easily morph into something unhealthy, where rather than wanting to contribute to others’ happiness and wellbeing, we find ourselves being people-pleasers in order to make them happy. Feeling as though we have sole responsibility for others’ happiness causes anxiety.