Thanks OP and Cyrena for your insight.

I am not sure if we are near the end of the tunnel but I notice and sense a change in him. More lightening of his mood, smiling and interacting with the children like he used to. Looking much better less drawn and grey. I am staying detached and giving him his space to continue his journey and I am at peace with that now.

I have to admit I am anxious about when the realtionship talks start as I don't want to get it wrong so any advice is very welcome.

Oddly enough it is only now over the last couple of weeks that I have mastered detachment completely. I know I will be ok whatever path I have to walk with the children.