Yet another rather reductionist approach to interpreting brain activity- an article outlining the brain regions and neurotransmitters that are engaged when a person is in love. Appropriately, this article was published on Valentine's day.
http://www.scientificamerican.com/article.cfm?id=your-brain-in-love-graphsci
http://www.scientificamerican.com/article.cfm?id=your-brain-in-love-graphsci