So my cousin, who is also my roomate, has a load of friends who enjoy smoking. I don't smoke because I don't like the way weed makes me feel (and it smells so bad) and because my step-dad smoked constantly, my lungs are very sensitive to cigarette smoke. At first everyone was respectful of that and everyone smoked outside. My cousin invited another friend to move in (just going to refer to her as Pothead) and this new roomate doesn't really care where she smokes and now the entire apartment stinks. Pothead is actually really good at cleaning and supposedly working hard to find a job, but she stank up the dryer because there was weed in the pockets of the clothes she washed and she wasn't apologetic, nor did she clean up her mess. My cousin didn't really ask me how I felt about all this and is actually kicking out our really nice roommate so Pothead's boyfriend can move in. I feel really bad about the whole thing but when I try to bring the subject up my cousin guilt trips or scolds me. She's also kicking me out of the room I've been sleeping in as well (I will be sleeping on a futon in the living room), which didn't bother me that much until I realized how disposable people are to my cousin. Chances are I'm going to be the next person booted from the apartment since I've already lost my room. My gut is telling me to get the hell out but I just got here and I don't know what to do. How do I deal with people like this? Any advice would be appreciated.
Sorry this post is kind of a mess I'm trying to type fast so my cousin doesn't see it.

I would gtfo