I am someone people come to with obsessive relationships and ask why. Logically speaking, if one is an adult and feels one will die if a lover leaves, there must be something more than meets the eye. The Nessus/Dejaneria relationship has this feeling. When the person snubs you, you feel as if the floor will open up and swallow you. I have seen enough people go through the same thing to begin to formulate some ideas.
I think that both people have to have had some childhood abuse. In each natal chart, you will find asteroids for pain, betrayal and abuse, prominent. In synastry( the chart which compares one person’s natal chart with another), the Nessus and Dejaneria will connect, strongly. The current relationship will bring up the horribly painful childhood abuse . The person feels as if he is re-living it. The pain will be horrendous,unspeakable. I believe that the current Nessus/ Dejaneria relationship is like an instant replay, in football, of the repressed emotions from childhood. That is why it is so intense, and so unexplainable, at the same time. Please, comment on anything I write. I welcome your comments.