The foundation of a lasting relationship is not commonality, is not give and take, it is not sexual gratification, and it is not to fulfill selfish desires to fuel a ego trip. The foundation of relationship is LOVE! The foundation of love is death to self, if you die to self a good relationship is assured because you are in it for the other person. In a relationship, perseverance and endurance with patience is love for the other person. If two people are in the relationship for the other person’s benefit it will last whatever storm may assail.