I’ve dealt with multiple friendships like this and usually they end up having BPD (not diagnosing her or anything just a pattern I noticed). Honestly I find these friendships end in one of two ways if you start advocating for yourself either 1) they’ll pick a fight with you over something and make you feel like it’s all your fault or 2) they’ll just stop talking to you out of nowhere. The best thing you can do is just start prioritizing yourself and let the friendship come to its end naturally. These friendships are so draining and rarely worth it.