You are good at describing your thoughts and the situation. My answer really depends on what you want. I guess you'd quite like to find a friend who is gay too. I won't rush down the road towards other things that you might want but being a teenager you often want things that you don't or can't get.
The truth is that you are playing a game with him. I know you think that you are not but you are. You want him to come on to you and you want him to notice you and you do want him to be gay and ... and ... and ... BUT you do not face the situation like an adult. (Why should you? You're not one)
If you want to have a better friendship with him then you need to put time and effort into that. Speak to him more sensibly. Talk to him about everything or anything. Develop a relationship that is built on friendship first. Then there are possibilities later.
Next - do not jump to conclusions. For all we know you are really cool. You may be a guy that lots of people look at and say - wow he's so great. That might make this guy just want to be a friend of yours. He may NOT be gay or even attracted to you. The only way you would ever know is that he might tell you if you became friends.
You are trying to go from A to Z in one move. Try going from A to B or even from A to C or D. Try to get to be a better friend with him. IF that works then fine otherwise just give up and forget him. IF he wants to be friends then he probably will respond. Invite him to do something. Invite him to go to a movie with you. No I do not mean hold hands or anything during the movie I just mean explore a friendship. That is where most things start.
HE is also playing with you. He knows that his glances and stuff are driving you up the wall (possibly positively possibly negatively) Being a teenager this is par for the course. The solution is to act more like a boring old adult. Try friendship. Try talking sensibly with him. If he is incapable or does not want to be friends then just give up on him.
Yes there is a chance that he is gay and is strongly attracted to you. That will emerge later when you have a better ordinary relationship with you.
Playing cat and mouse games is not the answer. I know its difficult but the best advice honestly is to be as sensible as its possible to be and not to jump to conclusions based on skimpy evidence.