Frustration - need advice again please?

I am back here already because it helps me to write it down, read it back and see if I can make more sense of it!! Yesterday (see last blog!) seems to have had the opposite effect than the one I hoped for!Got up today to him talking about things getting better 'one step at a time' ...seems he took the hug as an indication of reconciliation, despite me being very clear (I thought) that there was no possibility of that. Aaargh!!!!     When I tried to answer he simply walked away - right out of the house! He is back now, in the kitchen happily cooking himself some food. I am taking on board what people on here have told me - my responsibility and focus now must be to me and my children, but what the hell do I do about a stbx bouncing around the house like an overexited toddler who won't listen??? Shoot him down in flames???? It feels like when my grandma died - we gave up telling my grandad, who had severe Alzeimers, because we would have to tell him over and over and over.....and he 'knew' he had seen her 5 minutes ago!!! Now, my h does NOT have alzeimers but he does have some mental health issues and I am not sure how much of this is down to that and how much is just him thinking he can always get what he wants if he ignores the needs/wishes of others?! Any objective comments please?!