If I didn't read the part of your wife thinks she might be a lesbian, my response would have been,
"She is attracted to men, got with a man, married a man etc... So the fact that she may not accept it, is a grounds for divorce".
But after reading a lot of that, seems your wife is confused as to who she may be, and possibly also you.
The fact that she freely told her friends is horrible, and she had no right to. Things that are said to one another in a marriage is sacred grounds to me. However, A year ago I told my wife of who I am, what I have felt, and what is happening (you can check my bio for my story), while she accepts everything I have told her, it would not surprise me in the least if in a few years time, she wants a divorce. And I would not blame her.
My wife married me and fell in love with me as a man, and is VERY attracted to men and sex with men (me). So when I start getting more girly on her, she will lose attraction, and more than likely love for me.
I accept this, IF it happens, as I was false to her from the start. The fact I waited almost ten years to tell her is a fault of mine, even though I was still very much in denial of who I was. But in the same token, your wife married a man.
Our wives have it VERY hard, possibly as hard as we have it. So you have to consider their side too. For example, say you had no desire to do what you do, and stayed the 'alpha' male like I did for so long, then one day, your wife comes to you and says, 'I wish to grow hair all over my body like a man, wear guys clothing. Albeit occasional, I want to do it. How would you react? I am not sure, IF I was an alpha male or 'normal' male, that I would be as accepting at all as my wife has for now, and I can also say, that I probably would of left her after years of no attraction or love loss. Sounds horrible me saying this since I expect/want her to be accepting of who I am.
In any case, have you both considered marriage counseling? I'm sure it may be of some or little help. But it also sounds like your wife is very confused in life, it is good she is getting help for it.
In the end, you need to do what makes YOU happy, and your wife, if the same thing does not make her happy, needs to do what makes HER happy. Life is far too short to be unhappy, and being in denial for so long, I see I have wasted time. But I have the next 16 years to wait (due to kids, and the fact I was at fault for not telling my wife from day 1).
I know both of you probably love each other still, but you need to try and work as a team about all of this. I don't just mean you, I mean whatever other issues your wife may have too.
Best of luck on whatever journey you wish to take.