Going on a road trip! Recommend anything that is not on my list!

Hi, thank you for answering in advance! I appreciate it. I only have 3 qualifications

1.) That it be a romance without to much drama and heart ache. I dont really like romances where the main couple is sad all the time or bad things keep happening. 

2.) It has a happy ending. 

3.) Not over 6 years old. 

Side note : I am really partial to K-dramas but I am open to others. 

Flower Boy Ramen Shop.

That Fool
Ho Goo's Love
The Lover
Boku to Star no 99 Nichi
Hi My Sweetheart

Smile, You - though it is longer, the couple's so adorable together.
I Hear Your Voice and It's Okay, That's Love
Love Shuffle - a refreshing romance (it's fun, I give my word!)
I would add Secret Garden (I loveee it) but it does have some angst. :P It's a rollercoaster and never boring though. Same goes for Kill Me, Heal Me.

Since you've watched most of the best romantic dramas that came out in the past 5-6 years, you're missing out on other great dramas because of the 6 yr limit IMO. Just try Coffee Prince, it's still one of the best romance dramas to date for a reason - the chemistry, acting and story.

High-end Crush (2015)