Who can be the brick but I?

This song somehow feels like it resonates for me. I feel like I'm sinking slowly. But there's no brick tied to me, there's no reason I should feel this way. I think about what I need to do to get through the day, none of it seems difficult except in actually getting myself to try and I'm not sure why. I can quote the lines from the song (Brick by Ben Folds Five) but it has no reference to me, no real reference. Except I'm feeling alone, but there's no brick unless it's me.