Be who you want, whenever you want, wherever you want, however you want.
There is nothing stopping you but yourself, and the beliefs created which confine us from going beyond our limitations.
At any moment in time, if you want to change something about yourself, you can, and you can do it in the speed of a second. If you act in a way that consciously makes you feel like shit, take a moment to ask yourself why you continue to make yourself feel this way. No one is making you feel anything but yourself. You, your body, your mind, your heart, and your soul are the only things responsible for making you feel a type of way.