Your relationship with yourself is and will always be your primary relationship. It is inherently the most important relationship you have, and it is a relationship.
You have reactions to yourself. Every thought produces an emotion. Every action you take has an internal reaction. The more conscious you become about your relationship with yourself, the more all of your other relationships change.
The way you think and feel about yourself directly impacts the way you show up with your partner, children, friends, cowokers, employees, clients, neighbors, and strangers.
You are the common denominator.