What if a 10 year old boy might be attracted to boys?

The chances that you are actually sexually attracted to anyone at age 10 are unlikely. It is more likey that you just prefer being around the same sex and most boys your age do. I would give it a few years, until you hit puberty you cant really tell. And by then, if you still are then there really is no "what if"..you are what you are and you should not change that for anyone.