I'm inlove with Anime and Now I want to switch in live action
What drama should I watch?
I want Romance/Drama/School or Romance/Drama
I dont like Actions etc. 

And I dont like Old women and men inlove. I want teens or ages 20-29 couples
Romance and sad with younger couples (head's up, I didn't watch any of these because I can't handle sad things, but supposedly these are good):
I Am Sorry, I Love You
Koizora
Tree of Heaven
1 Litre of Tears

Other popular romances with young couples, but not necessarily sad:
Reply 1994, Reply 1997, Reply 1988
Hormones, Hormones 2, Hormones 3
Love Sick: The Series, Love Sick:  The Series Season 2
Ugly Ducking Series (multiple different seasons and plots)
Room Alone, Room Alone 2
Bromance
Sassy Go Go
She Was Pretty
School 2013, Who Are You: School 2015
Bride of the Century
Romance and drama
Endless Love – not sure about that, at the beginning the characters are in collage but then is time jump and have no idea how old they are later but i think they still should be in their 20’s
Mars (Taiwan version)– dark and twisted, not the crying sad but still leaves a sad feeling.
Tatta Hitotsu No Koi – age is definite match and there is drama.  

The series that may make you cry
Kamisama, Mou Sukoshi Dake – the girl is in high school, the guy is older, don’t remember his age, it’s a tragic story since the girl is sick.
Koizora – definitely liked the movie more but the drama was also good.
Silence – not sure of their age but the actors were in their 20’s so I assume the characters were too :lol: definitely sad.
The Hours of My Life – another disease sad story.  

I mostly don't remember the ages of the characters so I couldn’t recommend more series. If you would be interested in romantic comedies then there are many rom coms with teenagers.

and regarding 1 litre of tears it's a sad story but the romance is not the main thing and it's more subtle