“A person who experiences romantic insecurity tends to be both anxious and obsessed. For such a person, love is a tempestuous experience, involving a range of emotions: on the one hand, excitement, joy, and sexual arousal; on the other, distress, fear, shame, anger, contempt, and disgust. Everyone feels these emotions sometimes, but the person who is insecure in love feels them especially intensely and often goes quickly from one extreme to the other.”