My ex still finds me attractive?

He always flirts with me and we've kissed quite abit when we're out. Our conversation always turn blatently flirty and he calls me "sexy" which is what he used to call me when we were dating and gives me compliments all the time (he's not the type of guy to compliment anyone). Anyway, I don't want a relationship with him, but I am still really attracted to him, so I'm not too sure what to do now? Do I tell him or just wait and see what happens?

-He's also at uni atm, so I don't see him that much. We broke up 2 years ago and have never lost contact.
My ex still finds me attractive?
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