Don't know how to clear up a misunderstanding with a girl I went on a couple of dates with

Basically had a fantastic time with her and on the second date, I tried to invite her back to my place. She assumed that I was just looking for a hook up because it had only been two dates, and was offended and said she isn't into hook ups. I did tell her that it was totally ok and we could wait, but it seems to have upset her. She has been less enthusiastic ever since and I was wondering what I could do to get her to understand that I am simply very attracted to her, and that I am definitely looking for something more serious not just a hook up with her.