In life, the only thing standing in your way to the top is YOU. Not until you overcome yourself, you will not be able to overcome anything in life. You don't need to be scared of who you are. Stop telling yourself that you cannot do it and start asking yourself, ' how can i do it?' don't be the mountain blocking your way to success.
Believe in yourself; don't look down on yourself because others are looking down on you. Stop saying negative things about your ability. Even if they don't believe in you, I believe in you. Don't be the obstacle.