Long Term Marriages are Different
From Madeleine L'Engle's Two-Part Invention: The Story of a Marriage:    Speaking of her 40 year marriage to her husband Hugh Franklin:   "We were not a latter-day Heloise and Abelard, Pelleas and Melisande when  we married.  For one  thing, the Heloises and Abelards, the Pelleases  and Melisandes, do not get married and stay married  for forty years.  A  love which depends solely on romance, on the combustion of two  attracting  chemistries, tends to fizzle out.  The famous lovers usually  end up dead.  A long term marriage has  to move beyond chemistry to  compatibility, to friendship, to companionship.  It is certainly not  that  passion disappears, but that it is conjoined with other ways of  love.   Of course, the culture tends to glorify the passionate  whirlwind romance, rather than the steady  committed marriage.  Anyone  fortunate enough to share in the latter, to enjoy true love, realizes  how  empty is the former."