Girl with cute cheeks

So I am wondering, this cute girl with chubby cheeks started commenting on my posts on Facebook. We work for the same company, she is a receptionist, I work in a related field (and this is important, I think). It's a bit of a long story. She is always making jokes about eating pizza, and stuff like that. <br><br>Well, I had to come down to her desk earlier today, and she commented on my lunch. I was pretty resistant and didn't respond right away, but I am realizing that she might actually be flirting. She has a habit of making jokes or teasing to break the ice, and so I can't always tell what's going on. What to do?<br><br>&#x200B;