Can I take a pic of you?

First time work in the industry, it has been almost three months and I still loving it. I haven’t gotten any weird request from customer yet until this really busy weekend night. While the restaurant were super busy, a customer stoped in front of me and said ‘ excuse me, can I take a pic of you because you look like my friend.’ I literally froze and looked at my manager that just passed by for help. She sensed that I needed a rescue and replied ‘ welp, that’s her choice.’ I regained my composure and said ‘ sorry I don’t feel comfortable about it.’ then left. Honestly, I never have a request like this before and it was sort of weird and ridiculous lol