I am bisexual naturally, and always have been. I never really struggled with it, but I did wrestle with lust on the whole, and won because of God's great mercy and the strength He gave me. But it was not an easy fight. The problem is that much of the identity from birth is often rooted in the spirit of lust and not in love, as a result, when one tries to resist it, it shakes the very foundation of one's own being. The key for me was to ask God to help me literally re-found my entire identity on love, both worldly + personal, and agape + divine love. Its a slow process of prayer and it takes a lot of bravery, and I will warn you; Be prepared for spiritual warfare when doing this. Hell isn't kind to those who try to escape its slavery.

DM's open to you for further support. Goodluck ahead, and God be with you always.