I think it's healthy that you're seeking Outcome Independence now. You know rationally that you'll be OK, even if it doesn't seem possible just now.
I don't think any of us find the 180 easy. Many of the steps are counterintuitive, and seeing someone you care about flail about, and not be there to help... that's HARD.
It is NOT unhealthy to track him right now. It can become unhealthy if he has earned some trust and you can't give it to him, but right now the only way he can earn trust is through his actions that you observe. So long as you don't become obsessed for years about his actions, all you're doing right now is protecting yourself by removing the potential for illusion and giving him the opportunity to be seen matching words with deeds.
I've felt what you are going through. I empathize! If you take him back, for a time, yes, a portion of your time will be spent monitoring him, which means you'll be focusing a lot of time and energy on someone who maybe doesn't deserve it yet. If, however, he conforms to your conditions for taking him back, you'll start going hours, a day here and there, without checking, and it will be OK. Eventually this will turn into a week, then a few, then you can stop. If he does his part, repents and reconciles, it will no longer be a matter of devoting energy to make sure he does his goddamned job, but rather you'll both focus on each other AND yourselves... at least ideally.
Keep doing what you're doing. Believe nothing he says, and only half of what he does until his fog lifts.
me- 39, American (BS)
her- 45, South American (WS)
1 child (my stepson)
EA discovered 3/10
D-day (PA discovered) 8/11
D-day II, April 8, 2013 (while overseas w/family)
Attempting R, despite relapse.