I've said it before and I'll say it again, if you don't want to smoke vaping is going to be a part of your life now, if he doesn't like it you aren't married tell him to hit the bricks, he may come to see things your way.
Yes nicotine affects your brain, it keeps you sane, how many of us have wanted to rip someone's head off for breathing too loud when we tried to go cold turkey.
I tend to agree I think at the very least you need to keep supplies on hand so if the bottom drops out (ie big crisis comes along). You have your pv to turn to rather than a cig.