Love, love, love.  We are studying falling in love. ♥ There are four types of love: storge, philia, eros, and agape.  Storge is affections between family members, philia is love between friends, eros is love between husband and wife (erotic), and agape is love that is independent of one's feelings for another.  There are three dimensions of love: secure attachment style, which is the willingness to get close to others and feel secure in the relationship; avoidant attachment style, which is the effort to retain control of one's life by maintaining a certain amount of distance from one's partner; and anxious/ambivalent attachment style, which is an effort to maintain high-levels of  closeness and love in context of anxiety over rejection or abandonment.        
There are also different styles of loving, like Ludus, Mania, and Pragna.  Ludus is a playful love, Mania is a possessive, dependent love, Pragna is a logical kind of love.  It's kind of fun to think about what kind of love we have with our significant others.