You have a personal identity; you. What you seem to be lacking is some way to define or label yourself in other's eyes. In my opinion (which is worth exactly what you paid for it!), you don't need to do this. Who needs a label? Just do what you want to do, be yourself, and don't worry about other people. I know that's hard when you're 16, but it's worth thinking about.
Yeh people are always telling me to not care about what others think or say about me...but it doesnt work! I do care no matter who they are and what they say! Its just the kind of person i am i guess...i do hope i grow out of it though. But on the ither thing you said about just being myself...i dont know how to be myself, i dont know who i am....ill grow out of it though i guess...