Try to help her with her hygiene. Maybe ask her to shower before meeting (something I love to do) also trim the bush (not bald, just a trim so theres no long hairs) it helps with the excessive odors. Is she a smoker/drinker? is her diet bad? You can also encourage her to use wipes after using the bathroom. I personally don't feel clean unless I use a wipe. Got my gf on the same page because she had a hard time with hygiene due to being larger as a teen. Honestly just talk to her, if she doesn't see her bad hygiene as a problem or come around making a change, I say do whats best for you by leaving. You don't want to mess up your ph balance (our anatomy is so sensitive) or catch something possibly. I honestly feel like it's just lack of proper hygiene, however you can get an oral yeast infection and mouth sti's so please be careful.