I didn't know that this thread was here, but I want to share.
I am Bisexuality myself, and I don't believe in to reject other's love because the gender, that look like discrimination to me. And I don't see any betraying for a person to like both.
Also sometimes I got really mad at some girls because they sometimes reject me because of my bisexuality, they said that they fear that I will like other men more that they can't challenge with.
But that is not making any sense to me, I can love both men and women, and I will be only in relationship with one, not two, and that one would be either men and women.
I am very damn proud of being Bisexuality.