that is in informal writing. the one who type that used a kind of shortcut text or slang word. but the meaning of that is "your just disappointed or jealous because shes beautiful.

You are getting irritated as she is beautiful. This is a southern language.

this is visayan dailect in philippines.. it means like.. you're just insecure coz she's pretty. suya means envy or insecurity.. lang = just ka = you kai/kay = coz gwapa = pretty / beautiful man = more of an expression