Oh yeah,... i discovered some more when i opened my playlist..

Missing you- TEEN TOP
hello- TEEN TOP
Stay- MBLAQ
Heartbreaker- Justin Bieber
Wait For You- Elliot Yemen
I Need You- Kim Sunggyu
If you loved me- Zia and .... (i forgot her name)
With- INFINITE
Wish you were here- Avril Lavigne
Closer- Taeyeon (TTBY OST)
I'm Sorry- B2ST
Rainy days- Ailee
How could you do this to me- Ailee
Evening sky- Ailee
Voicemail- BAP
A shared dream- UKISS
Orion- UKISS
My reason- Kevin of UKISS
Turtle- Davichi
Be warmed- Davichi ft. Verbal Jint
Goodbye Sumeer- f(x) ft. D.O
A little too not over you- David Archuleta
Angels- David Archuleta
Because of you- After School
Because of you- Kelly Clarkson
Already Gone- Kelly Clarkson
Since you've been gone- Kelly Clarkson
Going to you- INFINITE

here's some of my fav XD

Jung Joon Young - Missed Call
Jung Joon Young - Really?
Jung Joon Young - The Sense Of An Ending
K.will - First Love End
K.will - It's Not You
K.Will - A slip of the tongue
Kang Seung Yoon - It Rains
SHINee - Selene 6.23
Xia Junsu - 11AM
Myname - In my place
Mr.mr - My everything
LEDApple - Are you eating well
Jung Dongha - Sad story

okay, that's enough XD

It's not really a 'sad' song perse, but you could try 'Paranoid' by Alana Grace that's really good.

Going Crazy-Song Jieun

BAP- Rain Sound

The Otherside- Alana Grace (Kind of, sort of on the sad side)

and...that's all I've got.

Baby don't cry- exo
Even in my dreams- G.O & Mir
If this was a movie- Taylor swift
Mom- infinite
Show me love- the wanted
Love you more- NU'EST
Don't run away- David archuleta
Insane- BTOB
Irresistible lips- BTOB
Still I love you- infinite
Heart attack- Demi lovato
When I was your man- Bruno mars
All she knows- Bruno mars
Grenade- Bruno mars
Hello- NU'EST
star- BTOB
Into your world- exo
Drowning- backstreet boys
What about now- Chris daughtry
Never let go- Ajax
Father- BTOB
In your eyes- TTBY ost
Believe (a shared dream album)- ukiss
With- infinite
Without you- ukiss
My dream- MBLAQ
Can you smile (remake)- infinite
Rust- MBLAQ
Only tears- infinite
Fixed star- infinite
Voice of my heart- infinite
It's all lies- bap
When I can't sing- se7en
We were in love- davichi & t-ara

I have laid out the ones that came to my head , sire.. Hope your highness will get some enlightenment on the story. *bows*

Comfortable - John Mayer
Come Back to Bed - John Mayer (What can I say? Dude writes some sad stuff!)
1Tym - Without You
C-Clown - Far Away, Young Love
And MBLAQ's version of G.O.D.'s Lie (so heartwrenching!)


I also totally second Teardrops on My Guitar.

You Don't Know Love - K.Will
Stupid In Love - someone that idk ft Soyu
Stay - Miley Cyrus
Teardrops On My Guitar - Taylor Swift

Angel by sarah mclachlan.
U can find the song meaning thru here:

http://songmeanings.com/m/songs/view/5755/

edward chun our love will always last ..
love is hard ost my girl
younha take care of my boyfriend