That's why you believe that? Lol.
Not all gay people act like that, it's just... A stereotype. And you will always have people who follow the stereotypes.
I actually know one gay guy who does not act like that at all. He shocked me when he came out to me. XD
Now some gay guys might actually naturally have that higher voice and that might just be who they are to act girly, but for those who choose to act that way it's only a stereotype related to the sexuality, not the sexuality itself.
I'm sorry but I'm not sure where you're going with this... So essentially you have not chosen to love somebody? Okay, yeah that's the way it works. But because of that homosexuals should not be allowed to date?
People will not always share the feelings, this is natural. It's that way for everybody.