I feel overweight

Amaya
So i'm 5'7. 12 years of age. Had my period at 10. Blah blah fat blah food blah blah need help blah lazy blah blah blah. I think i am overweight but everyone says im not. I feel totally uncomfortable about my weight, 140, and i need some help. Im a very lazy 7th grader who loves gym though and basketball but hates to work out when its not needed as a grade or college wise