the cancer of love relationship

There are many which cannot exist ... outside duality.
But i've also realised, even into my private life that
actually ... love relationships are too complicated.
Someone told me, just after i've finished this book ..
"The better you know a person, the closer you are to a
separation from him.
Knowledge detaches one being from another and cancels the grains of mystery that are in any existence no matter how flat/linear it may be.
I think we resist knowing the other for a short time because after that period, his/her presence becomes fatigue and
irritation."
Maybe i had to hear this, before i've started the book, but i guess is never too late to find out the secrets beyond a beautiful love story.
The term "cancer" ... is just a metaphor and i believe it can easily reflect the meaning of this book.
Defining the undefined.
And ... is funny cause the final conclusion ... for most of us is that ... it's all a dilemma. Experiencing many times an emotional balance in continuous form and ending as ... a nightmare.
But ... still chasing to continue.
Not being able to simple disconnect and stay away ... of
duality.