Funny, I see the solution as being avoiding the attachment to begin with. His argument applies whether or not you have cancer. Relying on another person for happiness is a foolish move. It is a much better idea to learn to enjoy solitude.Very Zen.
On the other hand:
Ten no atauru o torazareba, kaette sono toga o uku ;
Toki itatte okonawazareba, kaette sono wazawai o uku.
Not to take what Heaven gives is to incur Heaven's calamity; not to act when the moment comes is to incur Heaven's misfortune.
(Miura, Isshū and Ruth Fuller Sasaki, The Zen Koan. San Diego: Harvest/HBJ, 1965. 119. Print.)