This question, posted by ashleystar., is a good one. Sadly, recent scientific research says that the answer is no.
According to a new study, love only lasts four years. From the post on Genius Beauty:
Researchers at National Autonomous University of Mexico claim, that every infatuation lasts no more than four years. According to the scientists, infatuation which resembles temporary madness is caused by the activation of specific chemical compounds in the brain. Even the deepest love will not be there anymore, when the “reserve” of these compounds runs out (in 4 years at most). Then passionate love becomes just emotional addiction or sexual dependence.
Now what about people like me that fall in love a hundred times a day and keep that love for over twenty years?