CONGRATS!!!! (why the heck is your roomie trying to intimidate about vaping?)
Roomie's throat closes up, along with spikes in blood pressure, when exposed to vapor. I think it's the flavors b/c when I was making a new batch, roomie pushed the panic button. But he does have a history of chemical sensitivies, including to bleach, fragrances from household cleaners such as Pine-sol or Lysol, etc. But roomie seems to act as if it gives'em a license to browbeat me into quitting vaping altogether.
That alone is causing me to look for somewhere else to live, at least so I can vape in peace.