I'm very confused

about myself. Someone told me to just be myself (i appreciate the help) which would be great advice if i knew who or what i am. I was thinking about it and i don't truly have a personality, i tend to take on the personality of the person i am talking to at the time. I don't know who i am, hell i'm 55 years old and i still don't know what i want to be when i grow up! LOL I remember that assignment from grade school, i had to write an essay about what i want to be when i grow up...i failed.