How can I figure out if I am bisexual, or if I am just going through a phase?

Bisexuality takes time before you realize this, the stronger the attraction the bigger the chance of being one, honestly we should consult others to know if you fall in the category , try asking yourself about what your feelings towards other. Then you will know the answer to this

What you identify as is valid for who you are right now. It is possible for your identity to change in time but that doesn't mean it's a phase or any less real right now.

More important than figuring out your sexual orientation, it is important that you feel good with yourself and that whatever your sexual practices are or whoever your partners are, you feel good and respected.

If you feel attraction to the same sex as you do the opposite, then yes you may be bisexual. Many people will tell you its "just a phase" and will say many other biphobic comments but stay true to your journey and don't let other's biphobia stand it the way. You will figure it out, no rush - no pressure. Bisexuality is not 50/50 - it might be for you, but it's okay if not. I knew liked both girls and boys from a very young age. If it is "just a phase" then my phase has lasted 24 long years! :)

In all honestly, it doesn't matter if it's a "phase." What matters is accepting yourself in the present moment, and to remember that sexual/romantic orientation is fluid. It's susceptible to subconsciously change over time, and that's okay. Being bi simply means that you have the capacity to experience romantic and/or sexual attraction to people of two or more genders. Your dating history or current/soon-to-be partner has nothing to do with it. It doesn't have to be equal attraction either--I'm super picky with guys, but have almost no type when it comes to women because women are just great. It's important to accept your likes and disikes as well as your identity in all stages of life

Determining if one is bisexual or simply going through a phase is an intimate process that needs introspection and time. Start by freeing yourself to examine your feelings without pressure or judgment. Pay attention over time to moments when you have sexual attractions and emotional attachments, seeing if your interest in people from the opposite sex continues. It can be helpful speaking with others who’ve undergone similar situations or consulting with a sexuality therapist. Still, keep in mind that there are no fixed sexual orientations; it always keeps changing shape and rearranging its features in one’s life. Although we do understand how important it is for one to be true to his/her real self, this knowledge may come at any time depending on how fast one grasps it. Trust yourself and know that it’s fine to take all the time you need because you will eventually discover what resonates with you best.