https://penandthepad.com/characteristics-romantic-comedy-8671414.html
This link gives characteristics of romantic comedies. Within the list of these characteristics is the two characters being polar opposites of one another, ordinary problem, and a happy ending. These are the basic technics within a romantic comedy.
https://www.youtube.com/watch?v=jyFNdKCwlbc
Camera movement is also very important for romantic comedy. The shots should have both characters in the frame. Whether it be over the shoulder or long shot . The distance between the characters is what can help put emphasize on what is going on in there relationship.
https://www.slideshare.net/KieraTolhurst1/cinematography-in-romantic-comedy
This slide show shows common shots for romantic comedies and why they are common. The two person shot is the most popular of them all due to the fact that it is a shot which both character are in the frame symmetrically in most circumstances.