Those replies before me were really good. Change your negative thoughts about yourself and change it with your good assets. I assure you, you will find those (they are many). This world has a bad definition of pretty so don't believe it. They will judge you. But I tell you, you cannot control their judgments so better give yourself foundations to establish with your self-esteem. Don't let anyone shake you because of how they look at you or said at you.

Be yourself. Begin to accept who you are. No person is alike in this world. Look at your fingerprint. It's unique. None the same as you have. You are special. See yourself as special and wonderfully made.

With all that I said, having confidence starts with you. We are just here to give advises, how to's but it will be still your first move towards confidence. I believe you can because I've been there.