Hi WL! I had some trouble finding you! Im sure that dating an 18 year old boy is trying for a grown woman, especially when he throws fits like a child(which he is!), I wonder how their next interaction played out.
You cant worry about whether she wants to stay or any of that, really its not productive. What your doing seems to be working for YOU and your kids and thats what we need to focus on right now. Maybe some day she will want to get better enough to do the things that she needs to do, but thats all up to her. Let her get sad and see what shes missing maybe reality will set in at some point, maybe not.
I guess I gave the wrong finger to the wrong man...