The link below should be required reading for EVERYONE.  They should teach these things in school.  Love is not hyperfocus that fades.  Love is caring and nurturing and maintaining and being able to commit and embody trust.  The best equation for a good and happy marriage is to marry the right person.  How can you tell who is the right person for you?  I am embarrassed that I did not know these things when I was younger.  My young heart saw too many romance movies.   I guess I mistook all these things for love.  I wanted love but I didn't have a clue of what love was other than the expectations of what i saw in my family of commitment, hard work and honesty.  I will be teaching my grandchildren to not mistake lust, obsession or rebounding as love that could last a lifetime.

http://teenadvice.about.com/od/loveanddating/a/3thingslove.htm