The other side of Jamie's door would be the side she's on, the inside. She's lonely. She is afraid and has been for years. She pretends to be happy with porcelain smiles. Bones tear at her flesh inside. I suppose that means that she's being hurt inside, that's all. She lives in the land where her father died seems like it might mean all her thoughts are for her dead father. She can't hear your words means you can't get her out of her dreadful mood by talking to her. She feels nothing at all means again that you can't reach her. With no tomorrow means she doesn't look forward to anything to live for. Same for the line about emptiness. The song without an end is her unchanging crappy mood. The tree that can't bend is her unchanging crappy mood. The wound never filled is her crappy mood. The fourth deepest wound is incomprehensible, meaning lyrically unclear, a miss by the writer. The love that it killed is something sad, isn't it. That's my best guess. Every life has tragedy in it. I know mine has. Yours has too. Jamie is in one of those cycles when everything is miserable. Join the club.