Well, for one, are you really bi? Or just find people of the same gender attractive. A lot of people confuse physical attraction with romantic sexuality.
Could you imagine spending your life with someone of your own gender? Some people don't take this into consideration. Genders do have their specific "traits" like the somewhat feral nature of males and the foresight of females.
Could you actually stand not having any sexual contact with the opposite gender? Until you find someone you want to spend the rest of your life with, you'll be back and forth between genders, but unless you and your mate are into swinging or group stuff, you'll have zero intimacy with the opposite gender.
Just some things to consider. Bisexuality is becoming more of a fad and less of an actual sexuality. I see so many people considering themselves bi for all the wrong reason, I just want you to make sure that you're positive.
You might also be a pansexual. Pansexuals aren't limited to males and/or females. They don't see gender. They'd pair up with a hermaphrodite, tranny, ANYTHING!