Hi Trey, and welcome!

There are quite a few people here who have been through similar experiences to yours. Myself included: I grew up in a very religious, misogynistic, sexist society where my options for presenting as male were extremely limited. But that didn't stop me from knowing from a very early age that everyone else was trying to lump me in with the wrong category. I was forced into groups of girls and whilst they were lovely in their own way, to me their behaviour & interests were very weird and foreign. It was like being stuck with a group of aliens who have a different culture and all speak a different language.
It took me until I was 19 years old to figure out exactly what was up with me, and there was plenty of pain and trauma in between - not least of which, the physical & social changes brought on by puberty. So... was my realisation that I'm transgendered due to a fad?
Absolutely not. I first realised that I'm a guy back in 1976. Practically
nobody had heard of female-to-male transsexuals back then so my parents & teachers were convinced I was just going through a 'tomboy phase' because they'd never heard of anyone like me. I heard of my first transsexual (and realised that that's what I am too) in 1990... and to put 'fads' into perspective, Jerry Springer didn't have a TV show back then. So whilst hearing about another transsexual was a 'Eureka!' moment for me, I didn't decide to copy her because 'it seemed like a cool thing to do & I was bored'; rather, her experiences echoed mine so closely that I realised for the first time in my life that there are other people who feel the same way. I wasn't the only one! This is an actual condition; one of the variations on what it means to be human - and there is help available to make my life more bearable. Plus, she went from male to female so I definitely wasn't copying
that part of her story.

It's great that there's more publicity these days so that people who are gender-variant can figure themselves out more easily than we did back then. Of course, the downside of this is that it's only natural to think it's possible that you may be jumping on the coattails of the latest craze. But to me, it sounds like you were questioning the gender role assigned to you long before you'd ever heard of anyone else doing the same, and that you have persisted in doing so for many years. Doesn't sound like a fad to me.

Why not have a read of the current diagnostic criteria for Gender Identity Disorder? Have a look at this PDF, but ignore the first paragraph; it's just the tail-end of the previous section. See whether any of this describes your experiences. The description of people born female who identify as male starts at the bottom of the first full page:
http://www.aclu.org/files/images/asset_upload_file155_30369.pdfAs you rightly say, this is something that is best discussed with a gender therapist. But we're here for you too. And the good news is that, at 22, you're an adult and you'll soon be able to move out & start living according to your own rules rather than your parents'.