Every person who has ever done anything worthwhile faced hundreds of naysayers who said their dream was impossible. Believe in yourself, not other people's limiting opinions.
Don't get discouraged when things don't go your way. Trust that the Universe has a plan for you. Everything happens for a reason and everything will work out in the end.
You will find that your dreams will soon become a reality, and you will be living proof that miracles and manifestations are real. People will use you as an example of how it is possible to turn dreams into reality.