User blog comment:NoodleBooty/Why I believe Freddie won't break Sam's heart.../@comment-3143268-20110411231109/@comment-2011415-20110412135805

@Thebookthief EXACTLY my point! And we know that Sam  is  really in love with Freddie. Or else she wouldn't even had admitted it to herself. She played that "I hate you" game for so long, actually that long that Freddie seriously thought she hated him, it's not that easy to get outta that! If she just had a simple crush on him, she had tried to ignore it. But her feelings are obviously  that  strong that she had to admit them to herself, and tried to show him (being nice and all) even if she was absolutely scared of getting rejected and being heartbroken(come on, she thinks that he's in love with her best friend and that there was  no  way that he could like her back!).

I think she didn't even plan on kissing him. If you take a look at her emotions, she looks more like all of her feelings for Freddie suddenly come to the "surface" when he talked to her about taking a risk in love. She got overwhelmed by them, they were "taking control" of her, and that's when she kissed him.

You can actually see that pretty good when she's pulling away from the kiss: She has that "Oh-my-gosh-I-can't-believe-I've-really-done-that!" look on her face. She was kinda shocked herself that the kiss happened because she just couldn't help it....:)