How Can I talk to people the same way I talk to myself

How Can I talk to people the same way I talk to myself I just tried to talk with myself for like 10minutes And I didnt stutter at all I was talking with myself loudly i mean by loudly the same voice i use to talk to people and my stutter was gone And when I talk to people my voices stops at every word or repeat the same vowel like wwwwwe sssstudied ...ph-ph-philosophy and making weird facial expression cuz i couldn't get the sentence out This is leaving me pretty confused , I don't feel stressed talking to people its just like my stutters comes when talking to them and disappears after they leave