Is she not interested?

I used to date this this girl back in hs and I ran into her 8 years later. I reached out and we started talking. I do most of the reaching out, I think she's only said something first once or twice and she usually just doesn't respond back after a while. In Jan. I asked if I could make dinner for her for vday, she said yes, I asked what she liked to eat but didn't get a response. She's been studying for an important test so she's been really busy. So I asked again a few weeks ago she said yes. So we finally had vday. I made dinner put rose petals on the bed, all that good stuff. We had sex for the first time and she kept getting dry, even after a few more tries. Was she not interested/attracted enough? Anyways I was kissing her forehead, playing in her hair, cuddling, talking etc. Eventually I dropped her off on Monday but we haven't talked since. Neither one of us has said anything to each other. Is she not interested? Was she not into the sex either?