What Happens When

For Molly Kennan, senior year is already an epic disaster. It feels like the whole school knows she made out with Lily at that party, and now she's accidentally outed herself as a lesbian. Her ex-best friend is trying to ruin her life, and school generally sucks. All she wants is to drown her sorrows in sweet potato fries, but she finds herself tongue-tied by the diner's new waitress, Zia.
Zia is way out of Molly's league. Older, beautiful, and definitely way more sophisticated. It's probably just wishful thinking, but Molly can't help wondering if maybe Zia is flirting with her. Despite Zia's always-there boyfriend, Molly falls hard for her, and Zia says she feels the same way. So then why doesn't Zia break up with her boyfriend, and why does she keep so many secrets?
Then there's Lily, who she can't seem to stop accidentally kissing. When your head and your heart are saying two different things, which one should you listen to?