i think this is about being in a mental hospital. the 'shadow faces' are the pyschiatrists/nurses, 'pretending they know whats best for me' when really, if you are mentally ill, no-one really knows what it fels like except you. 'I've lost all ability to make any choices' echoes the idea that if you are in pyschiatric care, your life is not up to you anymore.
i think this is about being in a mental hospital. the 'shadow faces' are the pyschiatrists/nurses, 'pretending they know whats best for me' when really, if you are mentally ill, no-one really knows what it fels like except you. 'I've lost all ability to make any choices' echoes the idea that if you are in pyschiatric care, your life is not up to you anymore.