how do i deal with a friend who is currently having lack of empathy from (questioning) bpd

i need solutions for both me and her. yesterday (december 6th) i was confronting her about some conflict we had and was telling her about how she hurt my feelings and how she was acting was immature and rude, i had no clue what was going on as she was going “whatever” and “i really dgaf” which was weird because we’ve had our moments but from what i remember she had never acted like this, i kept confronting her and she continued to act like that and she was like “i have a lot going on” and later learned someone who she knew, her dads aunt passed. now ive had lots of family members pass and family friends hence why i believe no matter what no one should be treated badly because of personal problems and i had to learn that the hard way from trauma due to family problems because of such tragic things happening. and she told me today as i confronted her again and she said “i cant lie ive been in a state whwre i js havent fully cared much abt anything and havent rlly taken much seriously and even now im not able to fully take this seriously. i wouldbt say that i dont CARE abt anything, it js seems like a burden to be talkin to ppl lately”. she still is acting very not caring and im still bothered about what happened as it hurt my feelings and made my anxiety quite bad as i suffer from diagnosed depression and anxiety and on meds for it, and confrontation can also trigger my anxiety. i need advice on what i should do, or say. what boundaries i should set and what boundaries she should set