Dear Threshold,
My advice would be this for what it's worth...
It's hard I think because (for me), becoming sober is like looking at life through a new window and your world is changing and your mind needs to perform a 'paradigm shift'.
You are the most important person in your world right now and for the foreseeable future. You do not have to be responsible for another person's 'stuff'. You don't need toxic people/emotions in your life in early recovery (that's what I am finding). And hey you have to be self-full (I don't like the work selfish!) in this journey of life to keep yourself safe and sober.
Just be polite and assertive. "It's a pity you are feeling this way, however I need to get some sleep right now - so good night" and then hang up.
Are you on rhe AA 12 Step Recovery Programme?
With very best wishes,
SP xx