Dear Robyn,
I`m so sorry to hear about your best friend. I can only agree with you that a positive attitude and clear mind are the most important things in such situation! Well, what is her treatment plan? Even if she cannot be cured, she should be able to extend her life and have a quality of life!
I can suggest you to check out virotherapy, as it is said to activate the immune system significantly, thus letting the patient to have a quality of life.
Best wishes go to your friend and you,
Beatriice