Differences

Why is it that sometimes i can be strange, outgoing, and sometimes downright funny and most of the time i can't? I think I am too conscious on what people think of me. I totally need to forget what people think of me and just be myself. But how does one be themselves? How can I be myself if i don't really know what myself is? Who am i really? A question I pose to myself many a times just walking alone or those times of solitude i have. I guess that questions bothers me too much for me to ever really ponder about it, so I just drown it out with music. Maybe I'm music. I know that is vague and arbitrary, but I don't know what to say. Who am I? Really? Like seriously? Does anyone know? I'm lost.