I have found dealing with MLC behaviour - 'if in doubt - Don't'

It was your husband who left the marriage and only he can solve his issues. It takes a very long time to fully recognise and then disengage from our earnest desire to help them out - probably because in many emotional areas of our married life we were the emotional Fixer, if not the practical one too.

And so not forget, for many practical purposes, so many of those in MLC display traits that tick most of the boxes for sociopath. If his voice drew you in he probably meant it to.

It is good that you are talking, and this could be a genuine attempt start reconnecting - he doesn't sound a total basket case, but it could be a touch and go.

I would suggest you leave the ball in his court, and make that pleasantly clear. If he wants to talk you can be there, but for heavens sake do not go after him.