Your dreams, desires and goals are all determined by you, so be sure of yourself and erase those negatives and rid the doubts. Next, be an example to others.
It's so true, you have to believe in yourself before anything else. You only ever need to be yourself, you don't need to pretend to be someone else. There is only one you, you are unique and when you understand that, your confidence and self esteem will start to grow.