I am?

I'm an angel
I'm a devil
I am sometimes in between
I'm as bad as it can get
And good as it can be
Sometimes I'm a million colors
Sometimes I'm black and white
Sometimes I’m not sure what color I am
I'm someone filled with self-belief
And haunted by self-doubt
I've got all the answers
But I’ve got nothing figured out
I like to be by myself
I hate to be alone
I'm a million contradictions
Sometimes I make no sense
Sometimes I'm perfect
Sometimes I'm a mess
Sometimes I'm happy
Sometimes I'm miserable
Sometimes I don’t know who I am
Can anyone tell me who i am?