You don't need to talk to him, just ask him to send his proposal to you in writing. Keep all interactions by email if you can. I still get a knot in my stomach when I see an email from my ex in my inbox, but it's less than the knot I get from a text or a phone call, so I gradually trained him to do email only.
If he called , I "just happened" to drive through a hole in the cell coverage and the call got dropped. (When actually, I was snapping my old flip phone shut with a satisfying crack). When he called back, I'd answer "oh sorry, must have driven through a hole!" Or wait a bit and text that to him instead.
If he texted, I'd email him in response. Or tell him I sent him an email about it.
Eventually, all contact became via email - where I didn't have to see it if I didn't want to, and where I had time to consider my responses.
The less contact the better. And if he's anxious to marry Schmoopie (or has gotten her knocked up), all the more leverage to get a good settlement.
