He's doing what you asked of him (?). You called it off and wanted no contact.. what's he supposed to do, how can he 'make it work' when you've asked for those two things and is respecting your wishes? Calling it off and going no contact does not send a 'lets work on this' signal.
It's good he's working on his recovery and good that he is being honest about where he is regarding the relationship right now.
Tx