I know I would be a blubbering mess if I found out ANY of my friends had 4th stage cancer of any kind... DO NOT FEEL BAD about your overwhelming emotions right now.
When I had cancer, the things that meant so much to me were a simple phone call, greeting cards, someone stopping by and bringing a cassarole, a smile, a touch, a new CD, magazines, a new book, and most of all, just someone to listen. I babbled, I cried, I just went on and on, and all I needed was someone to sit there and go "uh huh", "Uh huh", every now and then.
You can be the friend indeed to your friend in need. Just be there.
Hugs to you, sweetheart, and have courage. Your friend is going to need to borrow some of yours.
Let me know if there is anything I can do. You have my email still, right? If not, PM me and I will throw it to you. I am here for you, honey.