

I recommend reading about the relationship escalator . although it’s a tool primarily aimed at poly people, even monogamous people can benefit from learning about how you’re allowed to not consent to societal norms.
TLDR: only you can decide if you wanna move in with her, if at all. letting other people tell you how to organize your relationship will only end in misery
you could probably use a fit-tested elastomeric respirator to filter out those particles!
I think a P100 filter should be able to take care of your problem, as I’ve heard many people use them for allergies.
there’s also the added bonus of COVID/insert pathogen protection since airports and airplanes are a leading cause of super-spreaders