"Lover" was met with widespread critical acclaim and was seen as a large improvement compared to the lukewarm reception to the more upbeat singles from
Lover that preceded it. Critics praised what they described as intimate lyrics and a romantic production. Many critics commended "Lover" as a testament to Swift's talents as a singer-songwriter, with Abby Aguirre of
Vogue describing the song as a "romantic, haunting [...] singer-songwritery nugget".
Slate critic
Carl Wilson found the songwriting "replete with the little twists of phrase and zoomed-in details that make the best Swift songs so Swifty". The production was another point of praise. Zoladz said that "Lover", which she deemed the best single off the album, did not have commercial potential because it sounded like an outlier on radio, but for a good reason: "It's destined for more sacred spaces, like headphones, lonely car rides home after dropping someone off at an airport, and first dances at weddings." Wilson lauded the "musical self-assuredness" that makes "Lover" a compelling track, Critics have featured "Lover" highly on rankings of all songs in Swift's discography, including
Vulture Nate Jones (2021), who ranked it 13th out of 179 songs;
NME Hannah Mylrea (2020), 12th out of 161, and
Paste Jane Song (2020), 6th out of 158.
Rankings "Lover" featured on many publications' lists of the best songs of 2019.
Cosmopolitan included it in the top 10,
Elle placed it second among the "19 best love songs", and
Idolator ranked it 63rd among the "75 best pop songs" of 2019. The track featured on unranked lists by
Marie Claire and
The Philadelphia Inquirer. Other publications that prominently ranked "Lover" in their year-end lists included
Billboard (21st),
Complex (35th), and
Pitchfork (87th). In individual critics' lists, the song topped the list by David Farr from the
Sarasota Herald-Tribune and made it to the top 10 (unranked) by Wilson.
Insider included "Lover" at number 104 in their list of the 113 best songs of the 2010s decade. ==Commercial performance==