Oh Stropps, I know everyone talks about disengagement, but I think it's nigh on impossible. You know that you couldn't/wouldn't put her on the street and listening to howling from a distance is a horrible sound. Does she have a trusted godmother type figure or other adult that she wouldn't lash out at, but may be able to get through to her? Did any of her counsellors or MH workers strike a chord with her? Or even a favourite teacher? I'm just looking for a channel to get a message across, if she's shutting the metaphorical door in your face.
Here the packing for the mountain climbing father son bonding session is in full swing.... this is currently dh crashing around, flinging boots, coats etc everywhere and ds lying in bed
.... I'm going off to see ddad with a mission to try to mend his computer. If I told you it ran on DOS, had WordPerfect and spoke to you a la Stephen Hawking, you wouldn't believe me! I may post a photo later.....It's often shown on those retro shows - how it was in the 80's etc......
Ds is better - ish. Peaceful, happy seeing mates, pottering... still quite volatile and reactive to small insignificant things, which is a bit nervy to live with. But he's sleeping, eating and sometimes getting some exercise, so little steps. Apparently we all get to go to family therapy soon - can't wait 
Just saying I love being alone and would happily spend my next 40 years pottering around, seeing friends when I wanted, eating what I wanted, sleeping starfish when I wanted......I have a friend who thinks the same and we peruse property porn of tiny fishermen's cottages. It's like our guilty pleasure.....
I'm so sorry about your dcat, Crem. I don't know what to say, but
. Take solace in baby reindeer......