That was all? She cared about him, which meant that there were no emotions there.

That better be a joke, because even what she said and what she was doing to him doesn't align.  

If she cared about him at all, then why was she kissing him back every time, only to leave him high and dry and push him away? Why was she into him one minute and then do not care anymore in the next, abandoning him right before he could figure out what was happening?

Probably, it was because she was drunk, and ...