what should i do

i'm a part-time cashier at a grocery store in a metropolitan area. I interact with hundreds of people almost every day. sometimes several times a day I get asked out or, on occasion, for my number. in the beginning, I lied about my number. I later realized that's a bad idea because many of the customers are regulars who buy their dinner at the store every night.

now I just try to brush off advances.

however, there's this one guy who keeps trying to get me to go for coffee with him. initially, I was very friendly with him, because he's Arab and it's always a joy to talk to someone in Arabic. I wear a cross. my father's greek orthodox, a big minority group in the country i'm originally from. the customer, an older, handsome Tunisian man, noticed and said he was too. i'm not a religious person. I think he thought I was, because he told me he was also greek orthodox. the odds for a Tunisian to be greek orthodox are pretty much non-existent. I don't buy it. anyway, he keeps asking me out for coffee. I always tell him i'm much younger than him. he doesn't want to listen. the thing is, he's always kind.

I want to know if there's something I can do to get him to stop asking and approaching me as he's a regular at the store. I'm sure i'm not the only cashier who has this problem at the store, but I never see anyone else complain to the supervisor.