Is the Waiter flirting or is it just Good Customer Service?

So I visited this small Authentic family owned Filipino Restaurant with my Mom around January of this year, after studying a bit of the culture for fun (Cultural Anthropology is my Major ) I was greeted by the waiter who must’ve be the owner’s Son, he looked around 17 (I’m 19 ) both the waiter & staff were so friendly & warm and the food was great!. On Easter Sunday i wanted to bring my Mom to an Irish Restaurant but she wanted to go back to the Filipino Restaurant after not going since Jan, after finishing our food my mom called the Waiter for a to-go box and once he saw me he gave me this weird “Look” like of surprise but with a Big Smile. I quickly looked down after making eye contact due to embarrassment and shyness. The experience was weird & I don’t plan to go back anytime soon but that memory always is stuck in my head.

Is the Waiter flirting or is it just Good Customer Service?
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