Lyric discussion by hauni 

Cover art for Madeline lyrics by Tickle Me Pink

I love this song. So deep. It almost makes me cry, especially around this part:

"but time had taken had taken its toll, she had no place to go. They found her body resting by the river.

I never said goodbye. I wish I would have tried. I couldn't hear her cries, as she filled her veins with lies, until she saw the light.

Madeline. Madeline. You will be remembered. Madeline. Madeline. We still have September. Madeline. Madeline. We'll see you on the other side."

To me, what it means is there was a girl he was friends with, and really cared about (Likely named Madeline) who he used to hang with, but she started to become sick and depressed, cutting herself, and believing all these horrible things about herself. Probably some other people involved who hurt her emotionally. She tried calling him(singer/narrator/Sean) but he was away at the time, but she didn't try again. They all knew she was sick and depressed and hurting but never did too much for her. She ended up killing herself down by a river. He regrets this and feels that if he could change one thing, it would be to tell her that she's gonna be okay, and try to help her over come it, and be there for her.