According to Greek Mythology, humans were originally created with four arms, four legs and a head with two faces. Fearing their power, Zeus split them into two separate beings, condemning them to spend their lives in search of their other halves.
What I want is to be needed. What I need is to be indispensable to somebody. What I need is somebody that will eat up all my free time, my ego, my attention. Somebody addicted to me. A mutual addiction.