I think part of love is acknowledging that yes--someone can have a number of great qualities (I think Jack's intelligence and verbal finesse were the two I would most highly praise him for) but at some point we have to love ourselves by recognizing that when someone is unhealthy, they can do a lot of damage.
Jack is like trying to keep an elephant in a homely 2 bedroom in the suburbs. There are lots of great things about elephants, but he's simply gonna stampede over people left and right. He needs to deal with his own demons.
Victor, it's been my experience that part of love is letting go. I promise that though it's a little scary you'll find things within yourself and from others to make you feel equally (more?) loved. You don't need it to come from Jack.