Katie,
I think that keeping in touch with a phone call now and then is a good thing if you are comfortable with that. For myself, I always maintained some contact with my daughter even in the worst of times. For me, I had to know that she was still among the living. The phone calls were more for me than her. She has been in recovery now for quite some time. Although she just recently relapsed with alcohol. She does go to private therapy once a week and is faithful about taking her bi polar meds and sees a pdoc.
She has a job and always goes to work. She is trying to get enough money to move out of my house. One thing that she told me several times was that she is so thankful that I never completely turned my back on her. She claims that would have made her worse if she would have lost me. I quit enabling her but I didn't vanish completely out of her life. I myself couldn't live with that. Do what feels right for you.
My best.............Lo