I feel totally helpless 
Having seen my lovely friend become engulfed by an episode of depression over the last couple of months, I have had a text today to say that she has been admitted to hospital. She saw a psychiatrist yesterday. I feel that this is positive as she had been feeling suicidal and hopelessly depressed/disassociated from the whole world, but for her it is awful and feels totally scary and overwhelming. This is not the first time she has been depressed or hospitalised because of it. The last time was while she was pregnant and before we were friends. She now has a three year old little girl.
Can anyone who has either been in my position (as friend) or her position (admitted to hospital with MH issues) advise me on the best, most helpful ways to be a good, supportive friend. I know I cannot change this for her, but how do I best walk by her through the journey...? All advice welcomed. TIA 
MPD