Why am I dreaming about this boy I don't even know I see him everyday never talk to him but I dream about him every night why?

There is no magical significance in your dreams. More importantly, they reveal nothing about the boy's emotions or any future relationship. Dreams are created within your own subconscious mind. This boy's appearance may match some unconscious ideal of "attractive guy" within your mind, and so his image is used by your brain to represent "an attractive guy." Your dreams are not about the actual person at all, but are about your own idea of what a nice guy should be. Please see the link for more information about the way our minds use images in dreams.

some say if someone is thinking about you, you dream about them or vise versa.

try talking to him....maybe he is like, idk "THE ONE" or some other lame excuse of a fairy tale sort of thing... does he ever look @ you? is he cute? is he smart? a jock? popular? what?