I think you did great Cil, telling your D how you feel and isn't it amazing how everyone seems to feel sorry for your exH! It goes to show what a strong and independent woman you are because everyone sees you as coping and he doesn't seem to be.
Maybe having all those people around him at the lake house isn't giving him the opportunity to get used to his own company so the times he does find himself on his own he doesn't know how to cope. I think you'd D needs to step back a bit and let her Dad experience the full consequences of his decisions and choices instead of wrapping him up in cotton wool!
(((Cil)))
Me - 47 H - 45 D-16 M - 6 years Separated - May 16
Don't leave me behind can't you see me I'm shining... (Years & Years - 'Shine')