about sex, I think you should leave that at least, now he dosent sound very steady so I belive the other facts are more important. But as he get to relax more then you can bring up that topic. some guys like there downstairs some dont, pretty much every trans guy have alittle issue about it for whatever there partner will think of it, some open up on the idea when they know there partners are fine about it, and some still wont have anything to do with it at all.
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first, he should be sure he is taking the right dose, so he dosent get too much or too litle,
mood swings can also be related to T, however, I would say I belive its more likely he could be hot temted because of stress with trans issues..
I dont think your doing anything wrong, but I think he might got alot of his mind, and I think he might be avoiding you because your the one it would infect, so he find it hard to face you.
ex. I was in the news once for trans activeties, and my mom was very agenst it and not suportive.
I had a great relationship with my mom, but I still tried to avoid her because everytime I talked to her it hurted.
if she was angry, it hurted, and if she was loving it also hurted because I was scared of losing her.
maybe he is worried of simular things?
its very hard to say, exactly whats going on, when his not telling you anything..