>>1
First of all, who or what you FUCK doesn't need to influence who or what you are drawn to. You can have anal sex with another guy and find that you really enjoy it, but that still doesn't make you gay. The gayness enters where you find yourself in LOVE with this guy. In you just love anal sex, that's more of a fetish.
That being said, it's a close call. On one hand you would be in love with a male, but on the other hand he hasn't reached puberty yet, so it really comes down to if it's his manliness that you're in love with, or his baby-ness.
I WOULD say that that would make your equipment really tiny, though.