Hi and welcome tytayoung
I think what you're feeling is pretty common...
I feel you need to take yourself out of the equation tho - you didn't cause his addiction, you couldn't control it, and you couldn't cure it.
Maybe now your ex is ready to shoulder that load himself...or maybe this is another abortive attempt in the making where he's doing it for someone else and his heart's not really in it...I'd hope it the former but who knows?
Either way, you're free and running your own life again, and that has to be a good thing....good things must be right ahead, if not already there
I'm glad you've joined us
D