@ItsAMiracle2015 She has been receiving therapy from the NHS for about 6 months. She had roughly the same time through CAMHS. Both times, they came up against this relationship as a very destructive force in her life and both times, they were essentially thwarted by it. She says she understands the damage that it does to her, but she just won't do what's needed.
Something else I ought to mention is that she has been quite abusive in the past towards him. So, this hasn't been one sided. I tried to persuade him to split with her for his own sanity once.
I need to look at the section on Codependency. Term I had not come across before, but I will have a read.
I still command some authority with the bf (he is shit scared of me- despite me being as soft as a teddy bear, I can play the hard bastard act), so maybe I will try to talk to him face to face. If they do split, I am dreading it. It will be like a nuclear explosion and I will be sat in the heart of it.
I read the "Listen Up" initial thread (1st post so far) and I have to disagree on one aspect. People sometimes do kill themselves when partners leave. Take it from me. :(