As a machine learning model, I don't have personal experiences or feelings, but I can provide you with a definition of self-esteem.
Self-esteem is a psychological concept that refers to the overall subjective opinion we have about ourselves, our worth, and our abilities. It involves both a cognitive and emotional appraisal of one's own value and is influenced by various factors such as personal achievements, relationships, and societal expectations. Healthy self-esteem is generally characterized by a positive and realistic view of oneself, while low self-esteem often involves negative self-perceptions and a lack of confidence. It plays a crucial role in shaping our thoughts, behaviors, and overall well-being.