It’s great you want to be a supportive friend, she definitely will need it! A listening ear is under stated, a lot of people will put on a brave front but reassure her you are there for her (if you can be contacted at any time, let her know).
Sometimes people don’t want to talk about their illness and this is a valid point. Cancer is life changing but there is still a person underneath all the treatments, medications and side effects. Don’t forget about other aspects of your friends life. She may forget herself. Things may shift in priority to her but I bet there are other things that interest your friend.
On the other hand, depending on the nature of your friendship maybe she does want to confine in you about some scary/serious/dark stuff. This may affect you on an emotional level and it’s important you take care of yourself in the process.
Perhaps you could mail a care/support parcel in the mail. You can really personalise things, include a few cancer related items (like a beautiful head scarf) and other non cancer items, even something homemade would be a nice touch. Be wary of scented items such as candles, body care items, as it may be nauseating to her.
