Perpetuating the "me" that I am not...

For years, I have been one person, said certain things, believed a certain way. But what I am supposed to do when I wake up one day and decide I'm tired of living the lie, tired of being someone I am not, wanting to be the someone that I am...where is the responsibility to be true to who I am? Is who I am and who He created different? Why are some people free to be who they perceive themselves to be, while the rest of us feel weighted and bound by who others perceive us to be?