Body image means how you see yourself. Positive body image and self-esteem are important. Puberty means lots of changes, and sometimes you can feel different or awkward. Don't worry -- all bodies are different. Nobody can tell you to look a certain way or that you have to wear certain clothes. Besides, real friends would not say those things. Accept who you are. Your personality and values matter, not how you look. If you exercise and eat right, you're healthy and fine. What's inside counts, not the packaging.
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