What is wrong with her?

So there is this girl that is asked out and she rejected me completely and said that we could not even be friends anymore. Then she blocked me on social media all of them. Recently she unblocked me on whatsapp and has been watching my status as soon as she comes online. Then suddenly she tells me to stop posting about her and got really angry about it but the thing is nothing I post is about her. I mean is she that paranoid and self-centered that she thinks I only think about her. Also why should she care about what I post she is the one who said we can't even be friends anymore so why care now. Honestly I think I should just block her...I still like her but she is becoming slightly annoying now.