Relationships are HARD in all their forms (personal, professional, and otherwise). They all need focus, commitment, and energy to stay healthy and survive. When one or more of those pieces is missing, well...I don't think I need to tell you what's on the horizon.
That might sound a bit harsh...BUT WAIT! What if....and bear with me here....what if you could take two proven business management concepts, change the keywords to add a human element, and finally crack the "longevity" code!?