While some of Flyleaf's songs may sound like they are about boyfriends, the band's lyrics are often open to interpretation. For example, the song "I'm So Sick" could be interpreted as being about a romantic relationship, but it could also be interpreted as being about a person's struggle with sin or addiction. Similarly, the song "All Around Me" could be interpreted as being about a person's love for their partner, but it could also be interpreted as being about a person's love for God.
Ultimately, the meaning of Flyleaf's songs is up to the individual listener to interpret. However, there is no doubt that the band's music is often inspired by their Christian faith.