My prayers and wishes for you, and him, that he quits NOW.
Sadly, my first instinct was to tell you to find another guy, because he can only quit for himself. Then to tell you to show him what I wrote.
I was the same liar, slave, for years, decades. A lot of us here were. You, and especially he, can NOT imagine what it is like to be free and to have true integrity. Self esteem suffers immeasurably when we do, without control, something we really are ashamed of for years, daily, many times. And when we have to constantly lie about it, regardless of how much we might claim truth is important. Addiction is really, really tough, and this stuff is among the toughest. It takes all you have, all you can give, to really quit. And it takes others, almost universally. Everyone here can attest to that, none of us were ever able to do it alone, though most of us tried.
Bless you and I hope your prayers and efforts are answered.