You're a great friend. Is it possible that she's too embarrassed to admit that she's getting help? I hate to put more on you, but have you looked in to what's available in your area, mental health-wise? Maybe check with the local health department, United Way or calling 211. Ask about sliding scale places. I live in small-town America and there are free health clinics in every county in the area. They have psychiatrists and/or psychiatric nurses. Maybe if you have information on hand, you can convince her to give it a try.

Thanks for being such a good friend.