Straight Boy keeps staring

So there's this boy I liked for years now, he's my first crush and he knows I like him and he says he's straight which me and everyone else dont believe. But this year in school I dubbed him and then he asked 2 of my friends why I dubbed him and then he found out I stilled liked him and he hasnt said anything about it. But now he continues to constantly stare at me our eyes meet at least 5 times a day and even when our eyes dont meet I can still see him staring at the corner of my eye. Do you guys think he's bi-curious? Im really confused and would like to know what you guys think.