When in a social event I always feel like my two personalities fighting.. one says me go dance be extrovert and one no be quite what if they'll laugh?

Yk i always see others enjoying happily bt I'm the one sitting alone in the corner.. I want to join them and my friends are calling me but still I can't. I always feels that on this event I won't feel shy but still I never feel myself I always judge myself for not being like others... I never fit in... Can u please explain why I'm like this and do someone experienced this nd how to feel better

When in a social event I always feel like my two personalities fighting.. one says me go dance be extrovert and one no be quite what if they'll laugh?
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