Especially in older classics, the "Zamidari" (landowning) culture or differences in caste and education provide the primary conflict for star-crossed lovers. Iconic Storyline Archetypes
Consider the iconic scene from Saptapadi (1961) or Ritwik Ghatak’s Meghe Dhaka Tara : The hero and heroine fall in love not while dancing in the rain, but while arguing about Bankim Chandra Chattopadhyay, or debating Marx vs. Tagore over a cup of cha. The Bengali lover courts by quoting poetry; the beloved tests his worth by dissecting his literary taste.