Yeah, I think I would agree, bisexual. I've noticed bisexual people can be highly adaptable in their mannerisms. For example, with him, I've noticed his voice drops low around me and he comes across classically "masculine" as we understand it (not that there should be a typical masculine stereotyped behaviour...), at other times he is 'effeminate'.
Honestly, it is so shit to have a crush on someone who is in a relationship. I want to just park my feelings aside, and leave it. It takes an exceptional level of maturity to just kill that feeling of hope within you. I don't think there is any hope he would ask me out, because he has been in this relationship for such a long time.
Thank you for helping me out here, it all seemed such a puzzle and I always second-guess and doubt in my mind, like what is going on here.