That makes sense. I suppose I just feel kind of trapped being something but really wanting to be something else. It's based more on the physical side of things.The organisers of the next LARP I'm going to pointed out that if you're, say, a small and fragile little thing, that shouldn't stop you from playing a mighty barbarian. You just need to focus on aspects of being a barbarian other than body type. I'm quite certain that with a little twist this can apply to real life, too.
This ties in with what @Fremen said, too. It might be worth a try attempting to focus on other areas and goals, instead of mere appearance. At least that's the attitude I'm trying on, since I'm starting to realise that if I base my confidence on what I see in the mirror, I will never be content at all either.
And this is a little out there, but I often think about how it must feel to be intimate with someone if the genders were reversed. (Like if I was a man) If that makes sense without me having to spell it out. And that's not anything I can ever experience.
But yes maybe focusing more on the...ah... personality side of things may help.