Has anyone HAD success stories in their relationship?

I’m in recovery myself. My Q (fiancé) was as well until he slipped up a month ago and drank one night. He told me outright and is working on getting himself better. I don’t tell him what he needs to do because it’s not up to me.

All that to say, does anyone have any stories where their significant other has truly embraced recovery and their relationship has flourished? My fiancé is the love of my life. I’m not naive to the fact that if he doesn’t continue staying sober my only option may be to leave with our kids. But, I also see him desperately trying.

Are there happy endings or middles for anyone currently?