Great job not calling him. And going "dark" while you are in treatment may actually work for you as he does seem to care about you and will likely think about you while you are in there.
Do you have any leftover cheesecake? It sounds SOOO good.
This may sound silly, but when I call my H, I always end it first (180, I used to keep talking and talking). Before I call, I think of my reason to end it and then do.