TO HIS OWN DRUMBEAT

"If a man does not keep pace with his companion, perhaps it is because he hears a different drummer"? - - - Henry David Thoreau

Companionship is the keystone to the foundation of human relationships.

It is often taken for granted by couples.

One's compassion and passion are the mortar that sets companionship to the solid foundation of the relationship.

In all of the LOST relationships, only one truly met the requirement for a lasting love affair: Rose and Bernard.  All the rest of the main characters were missing some real compassion or passion for their partner. For example, Sayid may have felt sympathy for Shannon after losing Boone, and had a passionate spark for her, but Shannon's M.O. was to find a man, anyone, who would support her. Her only asset was her good looks. That was not a solid relationship in any sense of the term.

The same goes for Jack and Kate. Kate used her charm to bounce around from man to man in order to get something from him: protection, money, a hideout, or escape. Jack did not seem to have the passion to hold on to Kate, and Kate was never head over heels in love with Jack during their island time. If she was, she would have never left a bleeding Jack after they defeated MIB/Flocke.

Besides Rose and Bernard, the main characters of the show walked to their own drummers because they were loners, lost in their own fears, self-esteem issues and social awkwardness that stunts human growth.