Clearly, the love triangle forming here has a lot to do with David’s shifting emotions, which suggests that Shay is actually the one being a bit selfish by implying that Tally somehow stole David from her. The warm feeling Tally experiences when she looks at David makes it clear that she reciprocates his crush. More importantly, though, it also drives home that Tally’s beliefs about pretties, beauty, and attraction is wrong—she can, and does, feel attraction for an “ugly” person.