Slow Dancing in a Burning Room

    It appears that John Mayer is having some trouble with his woman.  They loved each other at one point and it is now coming to an end.  He portrays her as not really caring that he is so broken and that he wants her to feel some kind of emotion towards this.  He thinks she's just trying to hurt him because she doesn't understand or feel the same way he is.
     I think the title, slow dancing in a burning room, means that their relationship is slowly ending, like a building on fire, and in a slow dance song, you don't really want it to end if you love the person you're dancing with.
     John asks, "don't you think we oughta know by know?"  Which I take it as they've had similar problems in the past and that they should've know that something would've happened again.