I've also had to deal with more loneliness than ever before lately, even while living with three other people in a small apartment. Of course, for different reasons (see my last post). But I imagine being in your position would be even worse. I personally have a small bit of experience with such a thing; I wanted to have a ftm operation before realizing I am simply agender and began feeling comfortable in my own body. That said, I can't imagine how things would have been if I went through with it. It'd probably be much tougher. I foolishly pushed my close friends away, but I assume coming out as transgender male would have done it for me. For whatever reason, people think the simple action of /identifying/ who you always have been somehow makes you a different person. It's stupid, but it's a mindset that is gradually being weeded out of society, fortunately. Luckily, although old friends have left you, there will always be more people to befriend--those who will love you regardless of your gender or whatever else. Those are the friends worth keeping.
I'm sorry my wording is horrible. I've had a tough day, and the worst headache accompanying the majority of it. But we all gotta keep pushing on. Things get better with effort and time.