It looks like you’re referencing the movie (2003) — “Como Perder a un Hombre en 10 Días” in Spanish.
Romantic comedy
A journalist writing a "how to" piece on pushing a man away in 10 days unwittingly becomes the target of an ad executive betting he can make any woman fall for him in the same timeframe. 5098-Como Perder A Un Hombre En 10 Dias -2003- ...