Buzzie, is this that guy at work who flirted with you but you weren't interested but then when you showed interest he backed off? If it is then I would forget the bloke, he is clearly playing mind games with you and just isn't worth your effort or company. He likes the thrill of the chase and then when you fall for him the thrill isn't there anymore and he backs down.
I would knock him on the head, but I bet you when you do this he will start flirting again, then you know exactly what his game is so leave him to it.
Put your energy into someone who is more worthwhile and isn't into playing mind games and having his ego rubbed :o)