Words of advice

No, not really - I'm more on the non-emotional talk side myself. My ex was very emotional about the split, but I'd done my crying and explaining and so forth during the relationship.

It seems like you want "closure" but he already has it, so you need to give it to yourself. Do you think you made a mistake ending it?

Fact is, he isn't the person you want him to be: he couldn't be emotionally open during the relationship, and he isn't afterwards - nothing has changed, so even if you did get back together the same problems would still be there. Maybe you need to move your life along rather than looking back?

Are you looking for some sort of absolution from him?

If he was unemotional, and that usually means uncommunicative too, before you left, it is unrealistic to think that leaving him would change that. Or repeatedly asking for a 'discussion'.

Are you disappointed that he didn't fight for the relationship? Which doesn't make sense if you really meant to leave him. Or was it an ultimatum to try and get him to change and he called your bluff.

I actually agree with him: what was there to discuss. You wanted to finish the relationship, he agreed. Job done. There is nothing to discuss now either, outside of your children's care. You are the mother of his children, not his friend now.

I'm curious what you feel the need to discuss? Do you want to take over why the relationship ended (seems pretty clear), why he didn't try to fight to keep you (also pretty clear), get him to accept responsibility (not going to happen)? What exactly are you hoping this discussion will entail? What outcome do you want?