Don't want to be a man anymore, do you ?

[Zooey]

So what is it that makes one a true transsexual? The act of transition or simply being (provided there is absolute honesty with one's own narrative, something which can never be proven or disproven)?

I'm not going to go down an endless rabbit hole with you on this one. I will simply say that, regardless of what you may in fact be, if you are capable of making the choice that you've made then you are (at least in some ways) somewhat fundamentally different from most of us who do transition.