The dependence on any human-being, other than yourself, makes you - shall I say, gullible. We've fostered the understanding that it is ok to rely on others. Foolishness. We would all be best if we stood on our own two feet never expecting much more than eating, shitting and breathing of another human-being.
Sounds hard, me saying it in this way and it's understandable that as children we unconsciously rely on our parents to feed us, bathe us, soothe us and care for us but at some point in growing up and growing wise you must learn that not even yourself is a stable creature.
I'm almost convinced the depending on or relying on another person is a bigger let down than your favorite team losing the SuperBowl.