Scientifically, the love you mean, affection, is the release of chemicals caused by the brain reacting to pheromones. It causes many stimulations in the body.
This is just too cold though. Love is where you feel happy with the person you're with. You can depend on them and trust them to stay with you forever. You see past each others flaws and love each other for them. You often have flaws that the other corrects and make 'one'.
Follow whichever you want, I follow my dick though; much more reliable.