I know I would like you face to face! I would wager big $ that your parents love you!
You are young, so I think the best way to develop self esteem is to make a goal and work to achieve it. Fitness goals, losing weight, learning a skill, a college degree, finding a job, saving money, etc. When you start realizing some of your dreams, you will love yourself more. For instance, I am proud of being a good cook. I have this skill because I have spent a lot of time cooking and am always trying new recipees or experimenting with what I currently cook. They say it takes 10,000 hours to become really good at something. When you are young, you can find 10,000 hours to work on your goals. Start small and build. You have youth on your side. Don't beat yourself up when you fail. I have a lot of faith in you because you are an awesome person!