Most Helpful Guy
Definitely text him, but you don't have to go as far as saying that you like him, just tell him that you think he ia cool and would like to keep in touch. That way you're letting him know you're interested without putting yourself out there in case he doesn't feel the same way.
Most Helpful Girl
maybe dont tell him you like him right away in case he doesn't feel the same way , just say hi and you want to hangout with him.