I think it's as ohsedateme says - someone dragging you into their downward spiral. It's about wanting to do anything you can to help that person - but the thing is they are dragging you down to the point you can't help them. To a point where you can barely help yourself (Your heads to heavy for me) You ask them to stop but they don't they keep you dragging down and as much as you love them you just can't help them anymore.
I think it's as ohsedateme says - someone dragging you into their downward spiral. It's about wanting to do anything you can to help that person - but the thing is they are dragging you down to the point you can't help them. To a point where you can barely help yourself (Your heads to heavy for me) You ask them to stop but they don't they keep you dragging down and as much as you love them you just can't help them anymore.