Different people have different definitions of bisexuality. E.g. some people still have more of a tendency to fall for one sex or the other. Others tend to have sexual relationships with one sex, emotional relationships with the other. It doesn't mean you have to have acted on your feelings.
Emotions count too.
The most important thing is what you say about it. Even if you don't actually use the word bisexual, if you acknowledge attractions to both women and men you'll be accepted as part of the bi community. The reality is that there are all kinds of bi people, same as there are all kinds of straight people or gay people or lesbians. However, it's the word most people use for sexual attractions that aren't limited to one gender. What you choose to call yourself is up to you .