In The Catcher in the Rye, how does the conflict beteen Holden and Sally reflect two people with very different characters and priorities?

Both Holden and Sally reflect being in different places in
different times, and yet being in a relationship.  Usually, such a configuration does
not always work out for the best.  This is no exception.  Sally seeks a more traditional
path in how she conceives of their relationship.  Her insistence on college coming first
and a more conservative approach to their relationship is in direct opposition to
Holden's vision.  His conception of the romantic good is one where definition is not
really clear.  Part of this is because he is not entirely clear about much in his own
life, and this is transferred onto their relationship.  Holden does know that he
disdains what others consider "advantageous," and seeks to find a new path that has not
been traversed.  In this light, Sally's suggestions are rebuked because there is little
authentically new ground featured within them.  In this light, Holden does not share the
same understanding that Sally does.  This might not be a reflection of a bad
relationship as much as it displays Holden's own sense of loss, insecurity, and doubt
about where he is in the world and his place in it.