If you are a bisexual girl will you go to Hell?

You will have to ask a scholar or religious leader in your faith tradition. As you probably know, some religious traditions don't believe there is such a place as "Hell." Other faiths believe that since God created humans of all sexual orientations, being bisexual (or homosexual or asexual or polysexual or whatever) is not sinful in and of itself, but acting on such impulses is sinful. Still other faiths find nothing sinful in homosexual acts, provided only that the participants are consenting adults.

At the very least, as humans we are expected to act responsibly towards other people in all we do, including sexuality.