How to treat W who goes out every weekend?

[TooLateForMe]

And (obsession, I know) I also think she was telling me things about how she's so okay with the breakup (repeatedly), she signed up for an online dating site, and was on a pseudo-date w/ her friend that night in order to hurt me or get a reaction. I gave her nothing (yay me). I was supportive and sweet. Problem is if she's out to hurt me then I can't continue being her friend. Should I let her know that this behavior isn't acceptable and would like more NC time? Specifying that it isn't the words or even the actions but the attitude of trying to upset me.