What is love?

Haddaway really sang about what love is in a spectacular and catchy tune, and Mango and Will Ferrell showed us superficial love in that Night at the Roxy (correct title?) movie. But what is love really? Is it just the release of and addiction to the chemicals dopamine and norepinephrine released by the brain during love?

Let us hear the engaging viewpoint of some scientists / geeks who know their material!
http://www.livescience.com/culture/090320-romantic-love.html