I'm 15 years old and I'm about to take my midterm exams, but I've always been troubled by my looks. In the past, I used to be very concerned about my appearance, and even a little bullheaded. Now, although I am a little more open-minded, and I know that studying and the future are more important, I still have a sensitive and inferiority complex in my heart. Recently, a male classmate whom I haven't contacted for two years suddenly sent me an ugly picture with a message saying "Which idiot is this? He said, "What kind of idiot is this?", which instantly broke my defenses. There are also boys in my class who call me "fat woman", I am really angry and aggrieved, but I am afraid of delaying my studies, how can I adjust myself?
A warm hug to you first.
It's all too normal to care about what others think at this age; we all want to be treated kindly, recognized, and liked.
But.
The words of those who disrespect you are not worth taking to heart.

Don't torture yourself with their mistakes.
Replace nonsense with practical action and get yourself moving.
Like exercising, reading, watching a movie, or meeting a friend for a night out - do you like it quieter or full of energy?
Pick a sport and stick with it. Good health and good spirits are the foundation. The easiest thing to do is to jog for half an hour every day, run and walk at first, but the key is to start moving.
Reading more and conversing with interesting minds is the right thing to do. While others are laughing at you, you're already making quiet progress.
Also, talk to people who genuinely understand you, don't expect kind words from people who don't like you, that's not very realistic.
I also came from adolescence, and looking back at the troubles of that time, they were actually growing up hiccups. After you get through it, you'll realize that it all becomes a story. Come on, my dear, you are the main character of your life, and let the gossip of the passers-by go.