Except for the last verse, where it says "Baby", nothing in the song implies necessarily that it is a heartache. It could be about anything threatening, like a bad job, a obnoxius boss, an illness, depression, an addiction, etc. Of course, the sense of the song fits better with a person (people don't go around talking to things), but it can be applied to anything you want your head away from.
Except for the last verse, where it says "Baby", nothing in the song implies necessarily that it is a heartache. It could be about anything threatening, like a bad job, a obnoxius boss, an illness, depression, an addiction, etc. Of course, the sense of the song fits better with a person (people don't go around talking to things), but it can be applied to anything you want your head away from.