I don't know your story, and I am not about persuading someone into or against transition, but I'm going to say this anyway...
Giving up is not the same as trying and failing. Failure is a result of giving all you've got (trying) and unfortunately not succeeding; giving up seldom requires any preceding effort and is a decision, not a result. You've got one life...one life. If you're waiting for a drop of rain in a drought, you're going to have a sad realization later in life at all the time that passed by; meanwhile you remained the same, if not worse. I get the impression you're wishing for a miracle, or else you're not interested. You are overwhelming yourself with bridges you've yet to even cross. We've all been where you are in some way or another, and others just as bad as you may think you've got it. Without self-confidence, without self-esteem and without self-motivation... I can most certainly tell you it will not matter which path you decide to walk, it will not offer happiness. Discovering who you are, regardless of outer appearance or whatever else, is imperative to a happy life. So, if perhaps staying a man is who you feel you are, so be it...but I am inclined to believe otherwise judging by your posts.
Nonetheless, your choice is your choice. Only you can know what you want. I wish you the best on whichever path you choose.