Mernit offers five ways to bring your characters to life and seven basic romantic comedy "beats." He has chapters on chemistry, humor, dialogue, and sex
comedy is probably the hardest thing to write.. I don't have any tips for you, but I wish you luck!
Also, I recommend this book: Writing the Romantic Comedy - Billy Mernit It's a good read, talks a lot about structuring a romantic comedy, and has tips on bringing the characters to life..
For the record, I love romantic comedy.. as cliche as it may be most of the time, it's still by far my favorite genre.