Some people have relationships with people of their own and the other gender, yet do not identify as bisexual. It all comes down to what makes you feel most comfortable and what you perceive yourself to be. Don't worry about not knowing for sure. Sexuality develops over time, and you should feel no pressure to identify in any particular way. You are normal.
Sexuality is just another part of what makes each person an individual.
Being bisexual is very natural. It s a part of who I am. Yes, it is perfectly natural for some people to be bisexual and to feel attracted to people of each gender. Sexual feelings towards women and men are perfectly natural and normal for bisexual people. In the United States, society does not encourage bisexuality, and that can make accepting your bisexuality more difficult.