Hi,
Really, there isn't much you can do. What I'd say is just be there for your friend. She's going through a really hard time, and right now, any support will help. Even a simple thing like checking in on her, or perhaps getting her a bar of her favorite chocolate will definitely help.
Also, make it clear that you're there for her. Right now, she'll probably have breakdowns etc at random times and having a friend she can call at anytime will really be helpful.
PM me if you'd like to talk about this more.