riiight! im 25, and when i was 16/17 they wouldnt diagnose me w anything but depression and ptsd, i never really considering bpd back then, knowing nothing about it, but my psychiatrist back then said she wouldn’t diagnose me with what she thought i had because i was still so young and constantly changing and that they generally dont diagnose teens w it. 5 years later i was diagnosed as an adult and thats when i learned more abt it. so yeahh i think most teens who claim to have bpd are just self diagnosed tbh