His regrets are forever linked to his fears of losing his sources. His loneliness is nowhere to be found when awash with supply.
Narcissists have no enemies.
They have only sources of narcissistic supply. An enemy means attention means supply. One holds sway over one's enemy. He seeks you out probably because he has absolutely no other NS sources at this stage. Narcissists frantically try to recycle their old and wasted sources in such a situation.