"Don't act like you know me. I'm just here to have a good time with my friends, so please step back." "You know my name, not my story. Let's keep it that way."
If you’ve liked someone from afar and finally want to say something: You Don't Know Me
If someone is being overly familiar or persistent, use this to set a firm boundary: "Don't act like you know me
Use this for someone from your past who assumes you're still the same person: You Don't Know Me