People who are in this relationship will be deeply attached internally, but fluctuating between these two emotions externally. The beauty in this relationship lies in this fluctuation.
Generally we always try to change the unique nature of this relationship either completely to the love or completely to the hate directions. Sometimes we struggle more than enough to change and start getting frustrated which leads to completely loose intimacy in the relationship. But instead of deep passion, inside which is not identified or ignored, we may get feelings like "duty" or "commitment" towards the relationship and totally turns up its nature into lifelessness.
Once we understand this fact and start accepting this relationship as it is, it will be the most romantic relationships ever. We can really enjoy the play of this awesome relationship.
Usually we find this beautiful relationship between the lovers, husband and wife, mother-in-law and daughter-in-law etc., These kind of relationships are very much interesting because of its unique 'love-hate' spice. They always like to love sometimes and hate sometimes, but the fact is they do not feel complete and also cannot live without each other. The prettiness of the enjoyment between their relationship is what more than this.
So these kind of relationships stood as an inspiration for so many romance novels, movies etc., Most recently a Hindi daily serial "Iss Pyaar Ko Kya Naam Doon" (Meaning: What Name Can Be Given To This Love) has come out, which is based on this "Love - Hate" relationship.
"Enjoy the beauty of the unique Love-Hate relationships in your life."