First of all, I would not jump to the "gay conclusion" too quickly. As everyone else has mentioned, there could be numerous reasons.
For example: My freshman year, I had the biggest crush on my best guy. Everyone of our friends knew it because I was somewhat obvious about it but he NEVER knew. This went on for almost two years before I ended up kissing him and he was like..."what just happened? you like me? I never knew..." Maybe he just sees you as a friend and doesn't realize you think of your hang out sessions as dates.
Just one situation.
