Fourth Comings by Megan McCafferty

Fourth book in the Jessica Darling series.

Jessica is back and as snarky as ever. She has graduated and is sharing a tiny apartment with her best friend, Hope, and her still-skanky friend, Manda. She enjoys her part-time job as a fact-checker for an obscure magazine, but doesn't make enough money to cover both her rent and her student loan payments. She babysits for her niece and feels like she is mooching because of the overly generous paycheck she receives for the babysitting.

She and Marcus are "on again," but Jessica doesn't see how she will continue the long-distance relationship with one of Princeton's newest freshmen. She intends to break up with him, but he shocks her with an out-of-the-blue marriage proposal.

Marcus asks Jessica to take a week to think about his proposal and, in the meantime, to write about her thoughts and feelings in a journal for him. Join Jessica for a week as she ponders what could (and should) come next in her life.