Quote from A Course in Miracles Text Chapter 16 - THE FORGIVENESS OF ILLUSIONS.

T-16.IV.3. The special love relationship is an attempt to limit the destructive effects of hate by finding a haven in the storm of guilt. 2 It makes no attempt to rise above the storm, into the sunlight. 3 On the contrary, it emphasizes the guilt outside the haven by attempting to build barricades against it, and keep within them. 4 The special love relationship is not perceived as a value in itself, but as a place of safety from which hatred is split off and kept apart. 5 The special love partner is acceptable only as long as he serves this purpose. 6 Hatred can enter, and indeed is welcome in some aspects of the relationship, but it is still held together by the illusion of love. 7 If the illusion goes, the relationship is broken or becomes unsatisfying on the grounds of disillusionment.