If we say that we have no sin, We deceive ourselves, and there's no truth in us. Why then belike we must sin, And so consequently die. Ay, we must die an everlasting death.
What's important is that you stay true to yourself. Because when you enter the real world, the most valuable thing you can bring is all your you-ness. The world doesn't need any more hot chicks or tough guys or smooth talkers - the world needs more you. And don't let anyone tell you otherwise.