Is this guy gay or not?

so i sit beside a ginger kid( no offense or anything) in cl. so every 2 minutes or so he would reach into his pants, and it seems like he yanks up his d***. he also likes drinking out of my water bottle a lot. and he puts the spout right to his mouth, after he has seen me drink it. also he opens his zipper in cl while no one is looking ( except for me of course) and it looks like he is masturbating. i dont really know, so any KIND ADVICE IS ASKED FOR! THANK YOU! Oh and if any guys wanna talk about puberty IM me!