they're treated differently coz there are so little of them in the world ... it's kinda rare to see two gay guys sitting in a train with their hands in each other's pants...
it's human nature! our attention is most drawn to things that are rare and different!
my advice is: get over it, and stop caring what others think about you (not that i have homosexual tendencies or anything, i'm straight)... but the more you "care" what people think, the more people will MAKE you feel bad... that's another aspect of human nature....
just get on with life...
cheers