Guy says he used to have a crush on me?

Anonymous
A really close guy friend of mine told me that he used to have a crush on me when we first met, about 2 years ago. I really have no idea how to respond to this. (He sent me a text, so I have time) Any suggestions?
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+1 y
He's referring to a time when love never really made sense to me, so I could've had a crush on him the whole time and never have known it. That's partially why I'm so unsure as to what to say to him.
Guy says he used to have a crush on me?
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