How do i know if hes gay?

(eeeeee) that is so cute i think you should ask him if his gay to bad for me i like a lot of Straight guys and i can't go out with them but there this one really cute boy in 4 of my cles i really like he may be gay or bi i don't know what to do i have even fantasied about him he so sezxy damn i think your friends gay i think you should go for it