Bridgerton Season 4 is the show that brought discussions about slow burn and yearning in romance back in mainstream. 
Where to watch: Netflix 

Hudson Williams and Connor Storrie headline the intense love drama 
Where to watch: Lionsgate

The TV Series follows the life of Emma and Dexter for 14 years, showcasing how they developed a deep, intimate connection. 
Where to watch: Netflix 

The four seasons of Summer I Turned Pretty is about the love triangle between Belly and the two brothers, Conrad and Jeremiah.

Where to watch: Prime Video 

The Sanjay Leela Bhansali directorial is an epitome of slow-burning romance and yearning in Indian cinema 
Where to watch: Prime Video 

Ranbir Kapoor, Aishwarya Rai and Anushka Sharma's Ae Dil Hai Mushkil is also a good movie if you are looking for yearning in romance. 
Where to watch: Prime Video 

Another classic yearning movie from Indian cinema is Veer-Zaara. 
Where to watch: Netflix