He knows that I still want him, so why does he do this?

This guy I know who works at a store I shop at saw me today. I was at another register being cashed out by someone else. And he standing at another register. And he nodded his head hi and then he looked away. As I was leaving he said have a beautiful night I said you too.

He and I have had sex before a couple of years ago while he’s been in a relationship and he’s still in one. And he knows that I still want him. So I don’t know why he still
He knows that I still want him, so why does he do this?
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