Peace - calls out of the blue are unsettling (I know about this!).
All you can do is be as kind as possible and try (as Job said) not to over think. If he contacts you again in the next few weeks/months (we all know what time is like for a MLCer) then he could be moving forward.
But as I have posted - this isn't about you and never was. These are his demons to own and deal with. Sadly we and our kids are collateral damage.
