It wasn't that I liked her and didn't like him. I thought he was very likable, but expected (because of the cultural stereotype) that she'd either take advantage of him or otherwise be cruel/mean to him, not fall for him. That was me falling prey to the stereotype of 'pretty' women being less nice people. There's probably a bit of sour grapes mentality involved in that stereotype, but it's seldom been proven wrong.
(Of course, as with all stereotypes, it's false, and I spent a good deal of time trying to break out of it during the movie.)

ETA: This concept could probably use a much longer post to clarify, but I think you probably understand what I mean.