How can I tell what my true sexuality is?

Its a pretty easy answer with a lot of questions in between. The short answer is "Who do you feel attracted to? Go with them!" But, obviously that is not always the easiest. My best advice is see who you feel the most comfortable with. Don't worry so much about "defining" your sexuality. Today way too much attention is put on the label. What club do you belong to? Gay, Bi, Poly, etc. Dont worry so much about that. Dont even feel the need to tell people about it. Just be true to your feelings. If someone of the same sex excites you, great! If its a little bit of both. Great! If you find yourself with feelings for a trans person, then thats who you should be with. Dont feel like you need a label. Just find joy, love, and peace with another person. I hope that helps.