Could he be bi? what do u think? help! pls?

Were 14 males and I'm a secret bi. It all started like a month ago when we first met and talked. Sometimes he looks over at me and smiles! And I do bak! He always comes over when we do group activities in cl and were freshman btw. We always talk bout s and bjs and look at on my fone a lot! And once he clicked on gay and blammed it on me! He was open with talking bout his and so was I we told eachother the length and stuff.. He once texted someone and asked them to hav gay and he told me he texted that to him but said it in a laughing way! Its so hard to kno for sure! Okay so then when he said I need a bj I said me to! And we just kept saying it bak and fourth I think he was giving clues! But then I said well since u hav lots of gay ppl who text u just ask them and he said I don't want one from a guy .... But once he asked me for nude pics.... He calls chick hot to btw help please and srry this was long