I feel like my entire life is a huge lie. Bit of background, DH has always been prone to bouts if depression. He refuses to seek counselling about it and handles it his own way (by which I mean drinking a lot)
The current bout started about August this year and he's been getting progressively worse. Additionally he started spending a lot of time upstairs on the laptop and taking his phone everywhere. I felt sure that there was an OW and have been looking for signs but in all honesty there hasn't been any dodgy behaviour and all he does is go to work then come home and drink so there wouldn't be the opportunity to meet anyone else.
Last night, I was out for dinner with some friends. I came home about 1.30am and found him sitting in the sofa drunk and sobbing. He was watching a woman being interviewed on a YouTube video (weird!)
I asked what was wrong, and he said "watch this". It then became apparent that the woman being interviewed was transgender and had been born a boy. He then turned to me and said: "I want to be her"
I actually hate him right now. He's fucking lied since the day we met. I asked him how long he had felt like this and he said: " since the age of 6." Turns out all the internet browsing upstairs has been researching the process of becoming a woman.
I don't know what to do, he just cries and says he doesn't ever want to lose me. I love him so much but I feel like I must be a complete idiot- how did I miss this?! I've never had even a vague idea that he felt this way. I am ashamed to say it but I wish he had said there was an OW as then I would just kick him out but this situation feels much worse as it's a total unknown. How can he just have "forgotten" to mention this?! Considering he tells me it's all he thinks about from the minute he wakes up until when he goes to sleep you'd have thought he might have mentioned it 
I don't know why I am posting really. I haven't shouted or argued with him (I just feel totally empty) and I just lay in bed crying all night. I feel horrible and I want him to make it better but at the same time as comforting me he's hurting me if that makes sense. Sorry if this isn't coherent, I'm just so tired and my head hurts. I feel sick, I can't eat anything. I don't know whether or not I want to just leave.