This episode of Pop Culture Detective is called Stalking for Love, and explores the movie trope about "nice guys" who relentlessly stalk and harass women they are obsessed with. It's remarkable how frequently this trope appears in movies.
Stalking For Love is a popular media trope where invasive stalker-like behavior is presented as an endearing or harmless part of romantic courtship. The hero will often go to extraordinary lengths to coerce, trick or otherwise manipulate his way into a woman's life.