An unhealthy addiction may have started out being something healthy. But the next thing you know they're preparing for marathons, compulsively training for hours a day, disrupting their lives. This is unhealthy. They are really replacements for the love we wish we had. Love is unconditional, it makes no bargains and it trades with no one for anything.
Love is supportive.
Love is firm. Love is most needed by the human organism from the moment of birth. Love is reciprocal in its effect and is as beneficial to the giver as it is to the recipient. Love is creative. Love is tender.