What does it mean when a guy jokes about being your date for a school dance?

Anonymous
After a past homecoming dance, this guy asked me if I would be his date for next year’s. I have to admit that I got so caught off guard by his request that I didn't respond at once to take in what had just happened (he casually asked me in class, so it was completely random), but then immediately after he said that he was joking.
Updates
+1 y
Update: He really was just joking and thought that it was funny, even though I thought (and hoped, a little) that he meant it.
What does it mean when a guy jokes about being your date for a school dance?
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