How do I flirt with him...?

I work at a pizza place, and there is this cuteee guy that comes in every now and then. Usually, it is him and his girlfriend. They're always extremely nice, and I have always been fond of them. A while ago she came in alone, I didn't think much of it. Today he came in alone and flirted with me, I think. He had intense eye contact, smiled a lot, just acted different than he had before, like happy to see me almost. I took it as some casual flirting. This added to my suspicion that they may not be together, though it is obviously not for sure. My question is, how exactly should/would I flirt back? It has never really come natural to me...Thanks :]

How do I flirt with him...?
Just follow his cue: eye contact,smiling and just plain happy to see him. Ask him how he's been and where's his girlfriend (that way you know for sure where it stands). Just talk to him in a casual way. If you're close enough, occasionally touch him (on the arm or shoulder). Laugh at his jokes. Just try to be normal. If you act like you're trying to flirt it may not come off right since you aren't used to it. Take it slow.
Reply:lift your skirt!
Reply:you should be like so why are you soo cute were u touched by angels or is it just natural (lol) Luv Kenadee