Have you read 5 Love Languages? That would be key to communicating your feelings in a non verbal or threatening way. Anything you say now could push her away further, but showing her love in her language will help. Especially if she's still partially in your home.
It does get easier. It seems impossible now, but with time you'll learn a lot about your self and your relationship. Learn as much as you can, it took me way too long.
Like BD wrote, GAL and focus on daughter is really important. She'll need a stable parent in her life especially now.
