mv,
He is an EX. You guys have broken up. You aren't obligated to feel any way in particular about his recovery. And how HE feels right now is really not your concern.
I SUGGEST you stop contacting him and block his messages to you. Ongoing contact between the two of you will only keep you from moving forward with your life. If you must, send him one last message saying that you wish him the best, but that for your own sake you must ask him to stop contacting you. Then block any further messages.
Many of us (myself included) found that not getting regular updates on an ex's progress (or lack thereof) helped us get OUT of that mode where we continued to pine for the dreams that were never based in reality. I didn't stop caring about my second husband, but I found my life became much more peaceful and pleasant when I wasn't getting regular interruptions about what was going on with him.