how to cut off a friend

assalamu alaykum everyone. basically, i have a friend who is atheist, i have been friends with her since four-five years ago and we are fairly close friends, we go out quite often to the shopping centre, etc, she is from a muslim background but her parents are not practicing and she is 100 percent atheist. well, recently i have noticed her behaviour is very odd and though she doesn't outwardly act different towards me she reposts anti-islamic content and now even engages actively in anti-islamic content and ideas. i am wondering if i should talk to her about it but i'm not sure if that is a good idea. she always reposts these things about islam being against women etc and the taliban representing islam... [her family were directly affected by the taliban so it's a sensitive spot for her] but everything she reposts has been debunked loads of times yet it seems she ignores that. this ramadan, i am getting a serious urge to cut her off because the things she is posting and reposting are becoming more and more anti-islamic and i really just don't want the stress in my life. do you guys think this is a good idea [yes, i've tried giving da'wah, she doesn't really listen at all] and if so, how do i just casually drop her like that.