He's been clean a year and seems on a good path.
But now let's talk about you. You can spend your life living in fear that he will cheat on you again, and spend your energy checking to see if that might happen. Or you can work on your fear issues and try to get past them and then decide if this relationship is right for either of you.
Sweetie, we cannot change the past, not one day of it, but we can decide how we would like to live today...and tomorrow...and then work on the issues that haunt us so that we can get past them and heal.
There are no guarantees in life, but if we live in regret of yesterday and fear of tomorrow, we lose all the joy in today.
I'm glad you joined us, welcome.