I know what you mean about wanting his approval, but I know you know that you don't need it. You just want it. It is silly, but it would make you feel better right?
It won't happen until you are not part of his life anymore. I have seen this a lot, where the LBS keeps the WS around and then wonders why they are being strung along. And the answer is: It's because they are being strung along.
The WS is still used to all of the privilege they had from the marriage. They stay connected to have a base level of security. My ex called and texted me in the middle of the night once because a strange car parked in front of our house (I was not living there anymore). Sorry, call your OM or the cops. Not my business anymore.
WS's want to have their cake and eat it too, and it will leave you feeling used and abused. So you have to not let them. That's a huge benefit of NC. A good NC strategy compensates for our weaknesses by removing us from the manipulation until we can heal some and resist it all effectively from a position of strength. So congrats on your NC since October. Keep it up!
Save yourself. Nobody is coming! BD:11/2017 Filed:12/2017 Final: 2/2018