Why would this (thai) girl treat me this way?

I have been to this thai restaurant two times and the only waitress I’ve seen there so far (thai girl, early twenties) acts like she hates me. She acts friendly and smiles to other customers but she gives me this emotionless blank stare and the last time I was there, I asked for carry out and she just put a menu in front of me and walked away without saying a word. I am probably the same age as her and a tall and decent looking guy, I even look kind of asian because I am mixed. Why would she act like she hates me?

ask her