I think it's great that guys ride! And like everyone else that's replied I think most disiplines are dominated by guys!
Although I have to admit most of the guys I know that ride and love horses are older men not young teenagers.
It is seen by some poeple (not horsey people) as girly but I love talking horses with other teenagers! Girl or guy! It makes no difference to me!
It's great to meet and really like a guy that loves horses as much as I do! There should be more of you!
Also if you don't mind me asking, where do you live? What country?