nice to have you here.
here's my advice:
let this be his quit. no pressure, no nagging, no constant questions.
i just posted on another intro that you have to decide that dipping just isn't something you do anymore. the new you ain't interested in the can.
you also have to act like the new him is set in stone. constant worrying, questions, comments, etc can just remind him that this new him is NEW. so you will have to 100% trust him as a man of his word that he's not dipping.
now, you're also dealing with an addict; a junkie. no one in their right mind is going to 100% trust an addict right away. so you trust, but you quietly verify. watch him, log on to KTC to see if he's posted roll like a good boy, kiss him a lot. women are good at being sneaky... it shouldn't be a problem. :)
go out of your way to help him if he asks, but let him own this. YOU can't be the reason he quits. it has to come from within. it the reason is external, the quit will fail because that external reason will not always be there to remind him why he's fighting.
again, thanks for being here. you're already showing great support.