What is love anyway?

I found the article "What is Love Anyway" by Stephen B. Levine by searching for articles about what love is utilizing Auraria campus library's research database that is available straight from the library's homepage.

Stephen B. Levine defines love in seven ways.  Love is not a single feeling, love is an ambition, love is a moral commitment, love is a mental struggle, love is a force of nature, love is a deal, and love is a stop sign.  Levine is a clinician who works with men and women struggling in their relationships.  He is a therapist of sorts.  Through his work, he has developed these seven ideas as the different ways that his patients have come to define love.  He explains that once he can figure out what kind of love each patient is referencing, he can better help them to find a resolution in their relationship.
-One of the most emphasized points that he makes is that love is not a single feeling.  He states that one of the mistakes most people think is that love is the same for everyone, rather it is much more difficult than that.  It has two basic ingredients of pleasure and interest, however, attitudes layer and combine within pleasure and interest, diluting this feeling into an emotion.  Which is further complicated by the motive of each person for saying "I love you."
-Every person dreams of one day being in love and hopes to find the kind of love that movies and older generations speak of.  When a person states that they love you, it shows that they have yet to give up on their ambition of love.
-Love being a moral commitment is when people remain committed to each other out of a feeling of obligation to either a family or the promise they made at their wedding ceremony.
-Levine says that when people say they love him/her but are no longer in love, they are referring to love as a mental struggle.  This is when people are no longer able to idealize their partner, however do not want give up on their relationship based off of disappointment.  Perhaps they have a family, have an ambition for love, or just keep trying to tell themselves that their partners are good enough.
-Love is a force of nature is when the identity of you and your loved one have become some intertwined that you can no longer imagine life without them.
-Love as a deal is often times love that is only found when people fall in love again after a break-up or divorce.  Their vision is no longer clouded by the fantasy idea of love they first had but rather they think of the ways their life could be enhance socially, economically, and etc. by accepting a new person in to their life.
-The "darker side of love" as Levine puts it, is introduced with love as a stop sign.  This type of love is when people use love as a way of covering up true motives and when people use love as an excuse for not further discussing relationship issues.
One of the final key points that Levine makes is that there is an evolution of love:
1. infatuation
2. romantic love
3. consummate love
4. companionate love
As a relationship develops, this is the process in which love between two people often travels.  First, there is passion, usually without commitment.  Then there is passion and friendship.  Third, the stage at which most people get married, there is passion, friendship and commitment.  Finally, the ideal image of an elderly couple, there is friendship and commitment (Levine 148).

As I read this article, I was intrigued by two arguments.  First, that love is not a singular feeling.  I would like to continue research on this statement and see if I can find any article that perhaps contradicts this notion.  Is there anybody that thinks love is less complicated and diluted than Levine believes?  Is there an exact definition of love or is it really based on individual experience and attitude?  Also, his theory on the evolution of love is interesting.  Love is love, can it really change and develop into different stages of love?  I would like to further research this theory as well.

Link to article: http://0-www.tandfonline.com.skyline.ucdenver.edu/doi/full/10.1080/00926230590478005#abstract