If you are sexually interested in both men and women, but only romantically interested in men, you may be bisexual, but heteroromantic. Many bisexual people find that their attraction to different genders is different. Many bisexual people also see that they are more attracted to one gender, and less attracted to another, but still, consider themselves bisexual because they are attracted to different genders.
You might be bisexual, or simply bi-curious. Another possibility is that you simply haven't allowed yourself to feel a romantic connection to other women yet, perhaps because of cultural conditioning that tells you that women should form relationships with men. Still, you can't deny your physical attraction to women.
Only you can determine what your sexual orientation is. Go with what you feel is right. Perhaps you will realize that you are bi, or maybe you will figure out that you are straight or even something else.