Then Comes Love — Sophia Sasson

When she's invited to the end-of-summer party, small-town waitress Lily looks forward to a rare day of fun, until her dress is ruined by a wine spilling mean girl. Things look up when she meets a handsome soldier. Except he's not exactly available and Lily is done being second fiddle.
Joe never believed in love, let alone love at first sight, until he sees Lily. Tied between reenlisting in the army or staying to fulfill his obligations to his family, Joe suddenly finds himself needing to choose between keeping a promise he never intended to make, and one he wishes he could keep.