Shes obessed with ex...how do I play this

Hello,
I'm not that experienced in my game and I've been seeing this chick, I realized shes obsessed with her ex. We've been on a couple of dates. I managed to get a kiss from her, but kinda just got pissed at her this week about her obsession with her ex.

I'm busy as hell and she knows this, so I told her not to bother calling/texting me until she gets over him. I feel like I screwed up there, but that its repairable.

How do I play this off? I do want to hang out with this chick a few times... Do I pretend to care about her situation? Blow it off?

She is interested in dating me while she "gets over him" or wtf shes going through. I'm thinking about txting her tomorrow at like 5 and telling her to come watch a movie at my place.