That's such a hard thing to deal with, Kate. It is one thing to choose to smoke, and another to subject others to that choice. Have the two of you talked about him smoking outside? It's good that he tries to limit smoking to one area, but he also needs to understand that will still harm your health, and it is especially dangerous to be exposed to smoke as someone with COPD.
Make sure that when you talk about this with him, you let him know that you are happy he stopped smoking in the car and is limiting his smoking to the bedroom. That is a good start and it is easier for someone to hear criticism when we also give them positive feedback, too.
You might also share this article with him about the way smoke can linger and impact an area. It might sound discouraging, but if he won't quit, you can at least encourage him to continue to take steps to minimize your exposure.
https://copd.net/living/third-hand-smoke
I hope some of this is useful. You're not alone and we're here to listen. -Melissa, team member