what am i different from others?

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sometimes i will think who am i ,who are you and why are others. maybe it's abnormal.i am often in thinking,future,studying,working,the being,eg.then the question what am i different from others is now around me. i am a boy,not girl,a strong boy because of aporting.tennis,basketball and something else i often do.i like reading as someone .however,things what i can do others also do.i am a person,alone,then why am i? could you tell me? what am i different from others? thanks.