A girl told me in 8th grade that she knew I liked her, and was cool with it. I thought she was nice for not being creeped out that I liked her, until one day on college when I finally realized what she meant.
It’s clear that when they say they liked you in high school, it means that they don’t like you any more, and you blew your one shot. Don’t be a dick and try now, that ship has sailed.