Why do people always remember me?

I went to a bar a year later, and the bartender remembered everything I told him! My name, my age, why I was there a year before etc. This always happens to me, and it's kind of freaking me out. People that I met once in my life will still remember me years later. I'm a shy, reserved girl, so it's even more surprising to me. Why do you think this keeps happening?
Why do people always remember me?
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