Dear Lys,
I'm a survivor, like your friend, and the most helpful thing for me when I first discovered my 'problem' was just being listened to...without too much skepticism, but also not too much excited reaction, either. I was pretty cautious about opening up, so I think it's a compliment in your friendship that your friend discussed her issues with you. Still, you need to be careful about yourself and your own emotional involvement in her problems. It's kind of tough, knowing how much to give. If she tells you things you really can't handle, you could suggest she be sure to say that to her therapist. (I didn't like it when my friends 'played therapist' with me.)
Maybe if you just try to keep in mind how you felt about your friend before she told you about the abuse...that will help you remember she has not always been upset. Listen. But maybe suggest fun things to do, too. Therapy is awfully hard work.
Best wishes,
Margie