It is a mercy to have a faithful friend, that loveth you entirely, and is as true to you as yourself, to whom you may open your mind and communicate your affairs, and who would be ready to strengthen you, and divide the care of your affairs and family with you, and help you to bear your burdens, and comfort you in your sorrows, and be the daily companion of your lives, and partaker of your joys and sorrows. And it is a mercy to have so near a friend to be a helper to your soul; to join with you in prayer and other holy exercises; to watch over you and tell you of your sins and dangers, and to stir up in you the grace of God, and remember to you of the life to come, and cheerfully accompany you in the ways of holiness.
And C.S. Lewis (taken from Relationships: A Mess Worth Making, by Lane and Tripp:
When I have learnt to love God better than my earthly dearest, I shall love my earthly dearest better than I do now. In so far as I learn to love my earthly dearest at the expense of God and instead of God, I shall be moving towards the state in which I shall not love my earthly dearest at all. When first things are put first, second things are not suppressed but increased.