《怦然心动》前半段台词主要围绕男女主角布莱斯和朱莉的相遇、朱莉的神秘感以及布莱斯对她的迷恋展开，以下是关键台词整理：

布莱斯对朱莉的第一印象

- "I walked out of the door, I thought back to the first time I saw her. How could anybody, ever, have wanted to runaway from Juli Baker？"（我走出门时，仿佛回到了初见她的那一刻，怎么有人想要躲着朱莉？）

对朱莉独特气质的描述

- "Some of us get dipped in flat, some in satin, some in gloss. But every once in a while you find someone who's iridescent..."（我们中有些人平庸无为，有些人锦衣华服，有些人虚有其表，但偶尔你也会遇上一个光彩夺目的人）

对相遇的珍视

- "The higher I got, the more amazed I was by the view."（我爬得越高，越为眼前的风景所惊叹）

对朱莉的迷恋

- "I was completely smitten with her. It was as if I had known her forever."（我彻底迷上了她。）

对日常的反思

- "Sometimes a little discomfort in the beginning can save a whole lot of pain down the road."（有时起初的隐忍可以避免一路的疼痛）

这些台词通过细腻的描写，展现了布莱斯对朱莉从陌生到心动的心理变化，为影片奠定了浪漫基调。