I am close to my dad, very. But really it's the fact that one can feel dead inside and still go through the motions.
We all have different drivers. i sort of think the ones inside can wither and be totally useless but even at the worst bits, well for me dad has lost my mum and even if i think world better without i still could not do that to him. so i guess for me external drivers keep me here ...
work, and job satisfaction, seems to keep me sane

i don't think i'm the only one from what i see here