I may be able to help a little here. I had a roommate last year who is a male but he feels more like a female. He just started telling people last year that he wanted reassigment surgery. He even created a facebook page of his inner self. It is a female account. I say if he is not supporting you than leave find somewhere to go. You shouldn't have to deal with someone who won't support you. Do what is best for Jin and no one else. You can't please everyone so don't try. It took me some time to realize that. If you try to live up to what he wants you to be you are going to be unhappy for ever. I dated a girl a long time ago who felt she was born in the wrong body. I am female too by the way. She would go down on me but would never let me go down on her because she was unhappy with the parts she had down below. I never forced her into anything she wasn't comfortable with. I tried when we first got together but when she explained to me why she wouldn't let me I understood. If you feel this way than explain it to him. He will either understand it or leave. If he leaves than that is the best thing that could happen to you. You should never have to hide it from anyone. Best of luck
Kayla