The fear of external judgment is limiting your life experiences.
You worry that people will see your inadequacies and think less of you. Because of this you withdraw and isolate yourself from the world to avoid uncomfortable experiences and opportunities for rejection.
A lack of confidence is fueling your anxiety and adding further weight to your mental health. Your avoidance means you are missing out on wonderful opportunities for growth and advancement. Instead of waiting for acceptance externally, find it within. Once you find your value, you will see it reflected in your experiences, relationships, and health.