At the moment I really kind of dislike her, but that's what I usually go through before I get to the desired neutral/not really caring feeling that I need to have toward someone in this situation. I'm definitely not an sx-first but I'm pretty sure I'm sp/sx and one of the things I relate to in sx is feeling closely bonded to people, sometimes to an over-invested and almost obsessive degree, even if it is purely a friendship and not at all romantic (I definitely only like men!). So I go through anger and grieving and those sorts of things when things go wrong. The feelings aren't overwhelming like it would be in a romantic situation but they are definitely there at least somewhat.
At the moment a bit of time has elapsed but not a huge amount. So I think she is still obsessed, but I am not giving any indication of being interested in her or responding to anything she does. I think if I stand firm on that - which is a lot easier for me now - it will help a lot. Although, given that I have an internet presence that I can't really block her from entirely, some degree of obsession may continue. I want to say "maybe she'll move on to someone else" but I really feel for that hypothetical person!! It would be nice if someone of my efforts paid off and she ended up semi-normal...but it's not my problem now and I shouldn't hold my breath.