That sounds so much like me that it's almost scary but then again, I suppose many people here can relate to one another's stories.
I discovered that I was transgender when I realized that being in a female body prevented me from truly being myself. I've been forced to present myself as a female all of my life because that's what I was seen as by others but by doing so I was never able to allow my real personality to show through. When I present as a female I'm so uncomfortable with myself that my insecure, shy, backwards, angry and depressed personality traits overshadow my more positive personality traits. Once I started identifying as a male and being seen as a male by others, I discovered that all of those negative personality traits seemed to fall away. As a male, I'm confident, personable, passionate, eloquent and a natural leader and although I still have those negative personality traits, they don't overshadow the positive ones like they used to.
Being transgender has nothing to do with your likes and dislikes, your hobbies, your sexual orientation or your choice of clothing. It has to do with your personality and who you are inside. I think that's what JLT1 means by just being you.
My advice is to take some time to discover your personality more. Think about all of your personality traits, good and bad, then think about whether or not those personality traits are showing through in your daily life. If you find that you're holding back parts of your personality, especially the positive parts, then you're most likely not being true to yourself.
If you do discover that you aren't being true to yourself your next step should be to try to find out why. Is it because of your gender not matching your personality? I agree that finding a gender therapist is a good idea. A therapist will be able to help you answer that question and discover what it is that's not allowing you to be yourself so you can then take steps to change whatever is holding you back.