Is it normal to feel repulsed by her voice?

I've been dating this guy for about three years now and it's been - not boring.

In these years, there's been an underlying concern on his part where he feels he should be a she.

He's mentioned forgetting about this part of his life just as frequently, but is now convinced he was meant to be a She and is determined to do so.

He also admitted to me tonight that he's been using me for my personality. It sounded strange to hear it said this way, but when it sunk in, it stung so deeply.

During the same conversation he claims that he's been trying out different aspects that he found desirable in men and taking them on as acts that he could pull off. Concluding that none of them felt "real, like being a woman would, because [he's] always been a woman".

When he speaks as a female his voice sounds like an overdone southern belle and his expression looks like mania fighting to keep calm.

I feel repulsed and offended that he thinks he can suddenly be something I've grown up as. It's difficult to let the feeling go and I'm so confused over it.

Is it normal to feel as repulsed as I do by her?

Obviously this has much more to do with her voice, but I need to hear some outside views, as I've not had the balls to talk about this with anyone before.