Hey there Confused. I'm new to this forum as well , but I'm over two years full time. I'm 32 now. Madelyn sums it up great for me: "the pain of continuing to live my life in a way that didn't feel authentic for me was more painful than the fear and pain of transition".
Unfortunately, there is only one known treatment, and you already know what it is. Believe me, when I was 21, I was just like you. The idea of even coming out, let alone transition, was terrifying. I spent much time trying to "fix" myself. I too wanted to just be happy as a boy. Like Emma, I did the warehouse worker thing and tried to force myself to be a man. I used to tell myself "You're strong, of mind and body, so just make it happen, cap'n!", but as you are seeing, it is not easy. In fact it's emotionally and mentally draining.
Many are going to tell you to slow it down, and while I think you should be cautious, I also know how much I wish I had come to terms sooner, like at 21. So I would say to not waste any more time and energy on fighting it, it leads to a dark place, and to try to come to terms with who you really are.
I wish I could tell you how to come to terms, but I feel like it differs for everyone. For me, I realized my neice was turning 13. So what, right? Well, you see, I remember her being born, and I remember feeling mostly the same for those 13 years (wanting to be a girl, crossdressing, etc) and I just had had it. Enough was enough, and I was going to be damned if I was going to go another 13 years like that. It took seeing that I had not even made a dent in the feeling for 13 years, in fact the urge,need was stronger than ever.
I know you may not want to hear these things, but it just isn't going to go away. Just look to those of us who have taken the first big steps, and see if we aren't universally happy with our choice to transition.