I have a stupid reputation from last year, which was fifth grade. How can I redeem myself?

I have a stupid reputation from last year, which was fifth grade. How can I redeem myself?
Added (1). I have this dumb problem where I try too hard to be funny. I'm very ugly because im a little fat, have a little bit of a double chin, and wide face. Also retainers, glasses, and wild curly hair. I'm tall with a deep voice, which makes people assume I'm a big bossy bully or something. I have this friend who's perfect. Short, skinny, cute, blonde. She does gymnastics and she is so pretty that I'm the only one who seems to notice that she's really a drama queen and sorta a show off. It hurts!
Added (2). Also, Im starting Middle School this year. My crush likes my perfect friend. She is stealing my best friend I've had for 5 years now. There are a lot of guys who like me cause I'm into Minecraft and COD, but not the guys that I want to like me… I know I'm only 11, but this will affect how I live the rest of my life.

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