Hello FODN
I've never been a smoker, but I am a recovering alcoholic, and in many respects, IMHO,addiction is addiction is addiction, especially where physical/chemical dependency is concerned, and there's a few techniques I've picked up in recovery that might be applicable to your problem.
One biggie is the 'one day at a time' principle - 'keeping it in the day' - not thinking about the weeks/months/etc. stretching ahead without a drag - just telling yourself "I'm not going to have a cigarette (in my case, a drink) TODAY", and worry about tomorrow when it comes - similarly, not concerning yourself with how you *might* cope with various stressful life events if and/or when they arise - it's that approach that's taken me through a lot in the years I've been sober, including JW family ostracism, the loss of a very dear relative, and many other stresses and strains.
One other thing - you mention worrying about dragging (pun half-intended ) your partner back into smoking with you - speaking for myself and my own experiences, I learned very early on in my recovery (through JW-related family ostracism when I'd only barely dried out) that if I was to overcome my addiction, it had to be for myself and NOONE ELSE, since other people's behaviour toward can, has, and may still change at any time, and if I pinned my sobriety to that, I'd be done for. Also, I need to remember that I am responsible purely for MY addiction and MY recovery - noone else's - and that others are solely responsible for theirs.
A long-time sober man once said to me that he was always careful never to 'share beyond his experience', so I'll take his advice and leave it there - as I say, hopefully you might find the above principles helpful. It might also be worth looking up Allen Carr's book - he's apparently done great things with smoking.
I wish you the very best.