I second captains log's advice - you don't have the wisdom or the experience needed to deal with this woman.
She is 34 years old, she got this far on her own, chances are there's a trail of 'mistys' behind her.
You cannot help her, she must help herself - she knows what she needs to do & she's doing the opposite. Nothing you do, nothing you say will have an impact, I repeat, she must help herself.
I know I sound unsympathetic but I've stood in your shoes, I've been minder & carer (it would be ridiculous to use the word friend because that's what I was, minder & carer) to someone who was very ill, it is extremely difficult to disengage yourself, in the long term it can emotionally crippling but you have to step away.