Attachment: Also called companionate love, attachment is characterized by feelings of calm, emotional union, and security.It involves the brain's reward center and can imitate the feel of drug addiction.

Lust is driven by a hormonal desire for sexual gratification. Lust and love are often thought of as two distinct feelings, but anthropologists theorize they exist on a spectrum that can be broken down into three categories: Understanding the difference between lust and love Or is it lust? At the beginning of a relationship, it can be hard to tell the difference between the two. If you have butterflies in your stomach, feel giddy when you see them and daydream about your life together, you might be in love.