What should I do - ...

I have a friend who quit smoking even though her husband didn't. It takes a lot of will power to stop when he won't but you can do it! One thing that might help is to make a rule that smoking is not allowed in your home. I think that's what really helped my friend (nowadays, her husband only smokes at work.) She also was hoping to get pregnant so she quit before trying to conceive. It's all in your motivation. I quit for the same reason she did. It can be so difficult and I commend you for trying even though he won't!