The Upside of Unrequited (by Becky Albertalli)

Super charming YA novel seemingly designed to push all my buttons -- a witty chubby girl heroine,  nerdy love interest, lesbian interracial moms, an exploration of the bonds of sisterhood, progressive politics, a fun plot, an ending that resonated emotionally. Recommended to me by Jenfu, who knew it would be Mo-nip. Definitely loved it.