You will never be anyone but yourself. You were born in your skin and you will die in your skin. Learn to love yourself because if you don't love yourself, you don't respect yourself. How can others respect you if you don't even respect yourself? YOU are incredibly unique because there is no other person who walks this earth that is you. They don't look like you, speak like you, or act like you. Yes, everyone has flaws and nobody is perfect. Which is why you just have to be the perfect YOU that you can be. Everyone can improve in many ways, whether it's getting better at something, losing weight, gaining weight, etc. What really hurts me is when I see blogs cluttered with girls that are toothpick thin and comments saying "I really wish I was this small."
STOP comparing yourself to other people. You will never look like or be that person, you will only be you. You are already extraordinary, you just can't see it yet. If you want to see it, close your eyes. Eyes can only see the exterior and material things. Close your eyes and open your heart. Open your mind to new things. Change your way of thinking. You are so incredibly amazing that it sickens me you do not see it. You can do anything you set your mind to.
Don't drop your goals of losing weight just because I am telling you that you are perfect the way you are... but don't obsess over getting rid of everything but your flesh and bones.
If I were to give you one piece of advice that would dramatically change your life, it would be:
BELIEVE IN YOURSELF.