This is a very confusing situation, we see each other every day, we spent from 4 to 24 hours together per day, we go to the gym, we watch movies, we go out to eat, to play, we do everything together. I love him, but I treat him only as my best friend, but sometimes we look at each other in the eye for several seconds, and I see something I only have seen in his face, I'm always the one that breaks it because I get really nervous. He is usually that kind of guy that can hide their feelings really well, that's why is so difficult for me to know, we have talk about gay people, and he has exacly the same idea as me. Everyone think we are dating, my mom, his mom, my other friends, they make gay comments about us, we just simply ignore them. He is the one that always look for me, one time I was sitting very close to him in his bed, and when his mother arrived he moved a lot, it was one of the first time I saw him nervous, he is always defending himself toward his attraction to women, like if someone is attacking him, but nobody is. But I really think he is gay, but is trying to deny it to himself, he is a very conservative person, I just think he doesn't want to accept the fact that he is gay. Or maybe I being a very hard person to read too, I sometimes think that I'm the one putting the boundaries, another weird thing is when we go to the movies he sits two sits away from me, but I have the feeling that he is doing that so other people don't think anything.

Do you think I just imagining things, or there is a big possibility that he is gay

Its 60% he's also gay. But I'm in the same situation here.. I have a friend at school I really like.. (a guy too) but my mom can't recognize I'm gay but he is.. and I'm not sure.. we go to movies.. yeah.. he's actually shy at movies.. he will start siting closer to you.. just wait and see! :D! (in da movies)! I think he likes you.. just shy to say it! Try to tell him your kind of gay and you like him!

I does not mean he's gay. It could be that he just your friend, maybe he thinks you might be gay and is trying to keep his distance.
Respect his boundaries.

Yes, I'm planning on telling him one day, but I don't really want to risk our relationship, just knowing he is next to me, makes me happy.