The Love Energy
To begin to understand love energy, let me first give a definition that will make more sense as time goes on. I define love as an attention or energy directed outward, and the byproduct of which is happiness. The opposite is need or desire, which is the same attention or energy directed back to the self, and the byproduct of which is unhappiness. Reverse the direction of flow of attention or energy and you get the opposite feeling. Fall in love and you are in a state of bliss - but as soon as you want the other person to love you, you are miserable.
Fall in love and you have so much energy you can work day and night, but as soon as you reverse the direction of flow and focus attention on the self "Oh woe is me, aches and pains, etc." you have so little energy you can hardly move.