Hello!
A "pervert" in a broad definition as it stands today on Wikipedia, is a "person who manifests sexual behaviors that are considered particularly abnormal, repulsive or obsessive."
But you may ask, CONSIDERED BY WHOM, anyways?
Continuing on with this cited definition,
"It is often considered derogatory, and, in psychological literature, the term paraphilia has been used as a replacement, though this term is controversial, and deviation is sometimes used in its place"
Since paraphilia is used as a synonym to "sexual deviation" by some psychiatrists, mostly those who tend to be controversial in their views, it would be interesting for you to check this phrase on Wikipedia as well: "List of paraphilias". There you will see an extensive list with "atypical sexual interests in objects, situations, or individuals."
So, read them all if you wish. If you fit into any of those, then you would be considered a "pervert" at least by Wikipedia, citing Anil Aggrawal's 2009 book that compiled a list of 547 terms describing paraphilic sexual interests.
As you can see, it seems that pervert is being, at least according to Wikipedia, reduced to a sexual-orientation-related term only.
So those extremely close-minded people such as religious zealots, or ultra-conservative ignorants, seem to be the only ones who actually amplify the term to areas other than sexual orientation, including dressing up in "the other gender's" clothing. They see this as an aberration, as sort of a sacrilege, specially when what they call "men" (including transsexuals, such ignorants these zealot people are) do it, as opposed to when biological women do it, because they are so absorbed in their utter ignorance and unwillingness to use their brains just a little bit and open their minds.
I think you may sure be a transgender person, even if CURRENTLY social pressure makes you deny it, by saying that "you are a man" and "you are comfortable with it" and still calling yourself David even on here. I would think that, because of male privilege at that particular young age and trying to avoid losing your current social status, the respect of your family and friends, as well as the prospect of maybe becoming wealthy or well-to-do financially, it is the comfortable thing to "feel like", for the moment. It certainly apparently easily beats doing a 360-degree change to your current life, because that is exactly what you do when you transition into a transsexual individual, just as many of us have or at least are trying to do it with all our hearts.
But you should really consider this: do you only like to dress up as a girl/woman, or would you actually like to HAVE THE BODY of a woman in real life, not just wear the clothing and dream about it sometimes? Do you hate having male genitalia in reality, when you see yourself in the mirror, before going to get in the shower, but can take it because you still find it more convenient, socially, at the moment? When you see a pretty and very feminine woman, do you think more of BEING like her, rather than having her as your sexual partner?
Just some food for thought here. Everybody is different. But those dreams and behaviors of yours, must have some meaning, and probably you are just minimizing its importance for now, because just considering going through a transition would mess up your whole life as it is, and I don't blame you for not taking such a huge risk. Also, at your age, testosterone may mess you up pretty bad, by causing conflicting ideas and feelings in your brain.
I don't mean to confuse you any further by all this rhetoric. Yet as many stated before, if you can find some counseling in the LGBT community or the psychiatric field, specifically somebody specialized in gender identity issues, it would be best for you. Probably on YouTube you could find some Gender Identity confusion channels that could open your eyes a bit more, by addressing some of your specific concerns.
I wish you lots of luck finding out who you really are!
Cheers
Bibi B.
