Hi and welcome ssenteews
I've never been in detox or rehab so I have no idea what they're like.
I understand your resentment, but to be honest I think I'd rather see my loved one happy than sick and miserable?
There are sick, unrecovered folks everywhere.
I hope your loved one is there for the right reasons and that he uses this as the chance to turn his life around for good
Best wishes to you both
D