I am figuring out whether it is a BPD thing or a part of me which I would have had even without my BPD. Friends and family describe me as a preteen in an adult body. Most of the times they seem to say that in a positive sense though, something they find 'cute' . I am very bubbly and cheerful during  when happy whereas I usually take out my anger on myself privately (cutting ). 

Asking coz preteen was also the age I went through the most abuse. 