What should I say to a guy I haven't talked to for 2 years?

Okay so this guy in eighth grade would normally come up to me and say hi and ask me for hugs but I would always refuse. We were never really close and never had an actual conversation before. My friend dared to say hi to him but idk the right way to approach him (on a website that allows you to ask your friends questions). I don't be to overthink this but whats a subtle way to say hi but not make him think i'm weird? Thanks(: Any advice would be appreciated.