I think this song is about giving into depression, being submissive in terms of thinking things can change. She's with all her friends but she's alone at the same time and feels empty, numb because she's felt so much for so long. Now she feels nothing and she's drifting with the undertow because the pulling force of the depression on her is inevitable. It's insuperable. Quite a depressing song but still very good.
I think this song is about giving into depression, being submissive in terms of thinking things can change. She's with all her friends but she's alone at the same time and feels empty, numb because she's felt so much for so long. Now she feels nothing and she's drifting with the undertow because the pulling force of the depression on her is inevitable. It's insuperable. Quite a depressing song but still very good.