This guy I like keeps making jokes about dating me and it's driving me nuts, why would he make jokes like that?

For example one time we were talking and I made a snarky comment that kind of poked fun at him and then he said "I'll take you out... on a date" and then proceeded to say he was joking. And then more recently a few of us were watching this music video and everyone was talking about how pretty the singer was and I said "if I only I had her hair" then he said jokingly "then I might date you". I just don't know what to think about this and it's kind of driving me crazy because I actually like this guy but I don't really think he likes me.
This guy I like keeps making jokes about dating me and it's driving me nuts, why would he make jokes like that?
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