A bi person has a capacity for romantic and/or sexual attraction that is not limited to one sex. If you think about the people you’re attracted to sexually or romantically, and you find that both women and men are among them, you are likely bi.
As a bi person, you do not have to feel the same kind or intensity of attraction to both women and men. Many people experience sexual fluidity — bisexual attractions that shift over time, often over years or decades. In any case, there is no threshold or litmus test to meet in order to be bi other than having attractions that are not limited to one sex. There is nothing for you to prove, nothing to consummate, no requirement to “maintain” your bisexuality. Understanding and acknowledging your own sexuality is a personal process and is about living with integrity and being true to yourself.