he wouldn't leave the love of his life even if Natalie Portman turned up on his doorstep
I'd think about it...
On topic: Love is complicated, Love actually showed that it can happen in spite of dificult boundaries (Kinda... film was a bit unfinished for my liking) and it can apperently make people do crazy stupid things (you know who you are). But what is it? Is it the undying desire to be with someone forever? Lust can be confused with love. Also what about love at first site? Or like Barrington said does it need time to take root and develop.
Me, simply put I don't know.