My stepson is gay, and though he didn't officially 'come out' until he was sixteen, he had noticeable traits. Faggot was the word dart thrown at him most often, but also queer etc. He dealt with it by embracing it, owning it, laughing at it. An attitude of 'well if I'm a faggot, it must be super cool to be one". We taught him early on about ignorance and rather than being hurt (for the most part, there was always those days), he just felt sorry for their small minds.
I would say the best thing you can do for your little one is simply your best to instill confidence. Your love will go a long way in that department as he grows :) xoxo

Josh (with my son Ethan) when he was a senior- it was this day that he told me that knowing we always had his back made it possible to take on the world.

And he continues to do just that seven years later--with his husband--who is in the airforce :)