Just my thoughts. If you have male parts and like people with female parts you are straight. If you like people with the same body parts as you then you are gay. If you like people no matter what body parts they have then you are Bi. It has nothing to do with how you dress or present yourself.
That being said what does it really matter? I am straight but I am sure 90% of people who see me out dressed and don’t know me probably think I am gay, or transsexual. Who cares what others think? All that really matters is what I think, being true to myself and who I am. I am a man who loves to dress as a woman and present that way. If people want to get to know me then they learn who I am. I gave up a long time ago worrying about labels people use.
Also one can support a group without being a member of it, I support breast cancer although I have never had it, or you can be a part of a group and not actively support it. we are who we are.