Re: What to say next
Don't bother yourself with her, it's pretty clear that it's not going anywhere. I'd advise to move on from that situation and look for other girls. Unless you're interested in a relationship and not just to hook up, but I'm not sure what your intentions are, what is it you are trying to accomplish? As for just how to respond, I'd say to reassure her. Something like "It's alright, I just want to get to know you better." This is just an example, make it more interesting, make it funny, add your own flare to it so it's not so bland, you get the idea. Good luck.
"Act like you're interested, not like you care."