"You will never know what's behind my skull/
You will never know what's under my hair/
You will never know what's under my skin/
You will never know what is in my veins" reminds me of a kid talking about their parent(s) because most kids feel like their parents don't understand them.
"So won't you say goodnight so I can say goodbye" this is the kid and they're suicidal so they are waiting for their parents to say goodnight so they can stay in their room and harm/ kill themselves.
"You will never know what's behind my skull/ You will never know what's under my hair/ You will never know what's under my skin/ You will never know what is in my veins" reminds me of a kid talking about their parent(s) because most kids feel like their parents don't understand them.
"So won't you say goodnight so I can say goodbye" this is the kid and they're suicidal so they are waiting for their parents to say goodnight so they can stay in their room and harm/ kill themselves.