Natalie Maher from Harpers Bazaar called "Best Friend" a "standout from [Brandy's] nascent catalogue, as she floats over the airy instrumental, declaring: “You’ve always been here right beside me / So I call you my best friend.” In a review of parent album Brandy, Complex found that "even when things become a bit doe-eyed, as they do on [...] "Best Friend," the album’s mix of sharp soul and hip-hop production keeps heads bopping and things from teetering into corniness."
Natalie Maher from Harpers Bazaar described "Best Friend" as a "noteworthy piece" from Brandy's debut collection, stating: “You’ve always been here right beside me / So I call you my best friend.” In an evaluation of the parent album Brandy, Complex noted that "even when things become overly sentimental, as they do on [...] "Best Friend," the album’s blend of crisp soul and hip-hop production keeps listeners engaged and prevents the material from becoming cheesy."