I Love And Adore You is a two-player game of letter-writing and longing.
It's 6 pages. The text is slightly dense, but it's still plenty readable.
Gameplay-wise, this is a relatively long-term time commitment, and its material is fairly intense by default. You play by writing romantic letters to each other---in character, as people from the past.
The bulk of the game is guidance on how to do this that amplifies the intensity of the roleplaying. There are directions to remain in character, to 'break up' and end the game under certain conditions, and to gather and burn your letters at the end.
Safety tools are provided, as is a lot of cool historical context.
Overall, if you want a game that first and foremost centers strong feelings of romance, this is that. It takes time and dedication, but I don't think that's a drawback. I'd definitely encourage checking this out.