In the Mood for Love (2000)
"Why this helps" — Wong Kar-wai's masterpiece understands loneliness as a state of yearning. Two neighbours discover their spouses are having an affair, and instead of drama, what unfolds is the quietest, most aching almost-love story ever filmed. The slow-motion walks through rainy corridors, the recurring waltz music, the careful distance between two people who want to be close — it all mirrors the loneliness of wanting connection but not quite reaching it. Watching this film, you feel accompanied in your solitude. Someone else knows exactly what it feels like to be this close and this far away at the same time.