Buffy the Vampire Slayer (1997)

S2E16 Bewitched, Bothered and Bewildered

With Valentine's Day nearing, Xander decides to enhance his romantic prospects using magic. However, his attempts at witchcraft backfire spectacularly, leading to an overwhelming and chaotic situation. Instead of finding love, he becomes entangled in a series of unexpected complications, ultimately learning that sometimes, love cannot be conjured.