How do I fix myself towards heterosexuality?

As a bisexual you could choose to ignore your "gay side" and date exclusively female. Me being a gay person I don't understand bisexuality, but it makes sense that you could pick and choose who you want to date. But you will most likely always have homosexual attraction as well as heterosexual (unless your bisexuality is just a phase) so prepare for that. It's important to accept yourself. Best of luck.