"High School Sweethearts" by Melanie Martinez delves into themes of love, passion, expectations, and boundaries within a relationship. The song sets a series of requirements for a partner, emphasizing the need for honesty, loyalty, and genuine love.

In the chorus, the speaker lays out the demands for being their "one and only true love," which includes a promise of unwavering love and a threat of consequences if that trust is broken. The aggressive imagery of "rip your fuckin' face apart" highlights the intensity of the speaker's emotions and the consequence of betrayal.

The verses and pre-choruses expand on the speaker's eccentricities and emotional intensity, requiring a partner who can handle and reciprocate their level of passion and commitment. The song portrays a strong sense of self-awareness and a refusal to settle for a mediocre relationship. The repeated warning to "go home" if one cannot meet these requirements reinforces the speaker's boundaries and self-respect.

The post-chorus "High school sweethearts, line up" suggests a queue of potential partners who must meet the speaker's standards or face dismissal if they do not align with what the speaker desires. This could be interpreted as a commentary on the idea of high school romances or young love not living up to the speaker's current expectations and standards.

The bridge delves into vulnerability and the desire for deep emotional connection, asking for comfort, affection, and a memorable first experience. The contrasting imagery of being held through the night and being tied down symbolizes the speaker's fluctuating emotions and desires within the relationship.

Overall, "High School Sweethearts" can be seen as a reflection of the speaker's need for authenticity, passion, and commitment in a romantic relationship. The song conveys a message of self-worth, setting boundaries, and not settling for less than what one deserves in love. It serves as a bold statement of asserting one's needs and desires in a romantic partnership.