Yeah Boy And Doll Face Pierce The Veil

well i think this song is about a boy and a girl, who were obviously inlove at a time, but something happened, they broke up, and later, the boy realizes he still loves this girl, but than he finds out, the relationship doesn't mean anything to her anymore, and he's doubting if it really meant anything to her in the first place.
but thats my opinion. 
I also think  it's about a relationship going wrong, and the girl leaves him.
He doesn't even know who she is anymore, after all whats happened. He tries to kill himself by cutting; 'How do you know how deep to go before it's real?" The beginning is pretty self explanatory. The whole song is about the bittersweet feelings he has for this girl, how he will still lover her no matter what happens and what she does.