Hi Sasha,
I'm not really in your situation.. I won't be then such a good adviser..
But what I would suggest you, is to defenitly go see more specialist, differents ones.
Get different point of views and stck with the one that you think fits the best with you.
I was lucky that on the first try, I felt on a really ''adviser'' in a social Queer center.
As for the mix between Fantasm, and Identity.. well as I said I'm not an expert..
But I remember I once read, that sometimes thoses fantases are so strong due the the Testosterone Drive !
But befor you start HRT, I would sggest that you see someone more ''empatic and knowledgefull''
As for boys dating, well I would say, if you like it and enjoys it, than there is no problem.
But you shouldn't force yourself to do this if it's just a matter of fealling more feminin.
There is plenty of girls out there fealling as a women, and still being attracted to women ( me for exemple ).
You look also very beautiful, without HRT etc.. you already can pass fsarely well.
Maybe the Hair could be a giveaway. but Give it time !
It's very nioce and courageous that you went out like that and took the Bus!
This is one big step !
..... I havn't made it yet ....

What helps me to understand myself, is to write tings down.
àThe look back at it a week or two later.
Make a journal, if you don't have one yet.
Also what my therapist said to me, that I found pretty good.
'' you are surching and searching.. but what if you are already there ? ''
Having that In mind could relativize many thought.
Also: Take note of when you feel Happy, why, what makes you happy?
And same for sad feallings.
Well ... I hope you will find some of my thought helpfull !
Keep on Keeping on !!