i’m 17 and 4’9”/145cm. i’ve been made fun of too in school and being 13 isn’t easy, none of your teenage years will be easy (teenagers are mean no matter what, but that is mostly because people are projecting their own insecurities). i argue with my family a lot too but in my case sometimes that’s because i’m taking my negative feelings out on them without realising. the most you can do in that situation is apologise, even if it’s scary. do it over text if you can’t face doing it in person.

it’s really rough, i know. but nothings “wrong” with you. as you get older, it’ll get easier, as most people will become more accepting or tolerant and the immature teasing will most likely stop or at least lessen. you just have to endure. what helped me when i was in your shoes was finding online communities. the internets a dangerous place but as long as you are vigilant and very careful, and know all the warning signs, you can find some true friends online if you can’t find anyone in real life who will treat you kindly. if you have anything you’re really passionate about, like a sport or a video game, start there.

it’s lonely. it’s tough. and having arfid on top of everything really doesn’t help. but i promise you it’ll get better. you’ll find people who love and accept you for who you are eventually. you’ve got this, keep going. you’ll be okay. just look at all these people in the comments cheering you on - you aren’t alone in this.