Addicted to Love (1997) Subtitles

Good-natured astronomer Sam is devastated when the love of his life leaves him for a suave Frenchman. He therefore does what every other normal dumpee would do—go to New York and set up home in the abandoned building opposite his ex-girlfriend's apartment, wait until she decides to leave her current lover, and then win her back.

IMDb: tt0118556 · TMDB: 2058