Its always astounding how people stick around even in the most toxic and most bizarre situations, all in the name of "love"
(Not pointing fingers here, I did the same stupid thing at one point)
Anxiety is our body's fight or flight response kicking in... In this particular case, your adrenal glands are not over reacting, the anxiety is understandable. Listen to your body and run, fighting is obviously not bringing you the desired result.
Newsflash: Love doesn't treat you like crap.