Sorry for peeking into this, but aside from giving you a big hug, maybe there are a few things to think about.
You're not trying to fool anyone, hon. I think sometimes we all lose sight of the fact that we don't be ourselves to try and convince everyone else, we do it because it's who we are. We can't not be who we are. You said it yourself, you're not on T yet. You really have a whole host of physical changes to come when you take the steps down that road. However, both this and any way you choose to dress, to present yourself to the outside world... these things only accentuate who you are, they don't make you who you are. That comes from within. That comes from the person you know yourself to be. And when you have a strong belief in that, then anything you do serves only to reinforce that.
It's a vicious cycle: you don't think anyone sees the real you, so you stop seeing the real you, and that loss of confidence... that loss of self-belief, it makes you unsure of yourself. And so the cycle repeats. But it doesn't have to be that way. You can break the cycle. It just needs a change in perspective, hon. A change in your thoughts that you're dressing as a guy so others perceive you that way, and their opinions reinforce your view of yourself... how about maybe adopting the position of "I dress this way because it's a reflection of me, because I see who I am even if you don't."
You wonder if you'll ever pass in your life... well, the simple answer to that is: You're a guy. You know you are. It's not a test. You can't fail. When you let other people's views define you, especially when you think you know what they're thinking... you stop living your life, and you start living theirs.
You don't see the world through other people's eyes, honey. You only see the world through your own eyes. And because of this, if you see yourself through other people's eyes, you lose the thing you strive so hard for in the first place. You lose the person you see when you close your eyes, he who gives you the drive and the passion to be yourself... and replace it with a composite made up of doubt, and a hundred different images you think others see. It becomes like a fractured mirror.
You're stronger than that. You've already shown that time and again, simply by knowing who you are, and what you want. Use that strength to shift your vision from everyone around you, back to the one person whose view of you actually matters. Change from "Am I?" to "I am!". I think you may be surprised by the effect this has.
*hug*