He Is We – Radio lyrics

I think that there are three characters in this song: the boy, a girl, and the singer.  the boy and the girl loved each other, but the boy doubted himself, and put up walls.  that's "he grew up just a little too fast. Lost the need it's all in his past. "
This caused him to hurt the girl, either physically or emotionally. This caused the girl to get in some sort of accident, and die. That's "broken glass and a pretty face. " the singer and the boy are mourning for the girl, and the singer blames the boy for what happened. That's "silent mourn full of hate. " "quiet face, silent mourn. " is referring again to the fact that the girl died and they are grieving. The singer wants something to happen to the boy to avenge the girl's death. That's "screaming for consequence, bleeding for more. " the singer wants the boy to feel guilty for what happened, and that's "radio, bleed me a melody that will make this boy cry.  radio, bleed me a melody that will make him wonder why he was so cold.  write him a song that reminds him of a time when he wasn't tumbling down, down, tumbling down. " the boy is sad, that's the humming bit, but he's good at hiding it behind his walls, so the singer is angry. That's what I think this song means.
Sorry that's so long! I thought it up at like, 3 am so sorry if it doesn't make sense! ;)