Many, many songs.
You Could Be Happy - Snow Patrol
Heaven Forbid - The Fray
How To Save A Life - The Fray
Rosé - The Feeling
Fields Of Gold - Sting & The Police
We'll Live And Die In These Towns - The Enemy
This Song - The Enemy
Hey There Delilah - Plain White T's
Write You A Song - Plain White T's
Rewind - Paolo Nutini
Calm Down Dearest - Jamie T
Help Me Please - Hard-Fi
The King - Hard-Fi
In Joy And Sorrow - H.I.M
Wake Me Up When September Ends - Green Day
Freewheel - Duke Special
This Could Be My Last Day - Duke Special
No Cover Up - Duke Special
The Diary Of Jane - Breakin Benjamin
Breath - Breakin Benjamin
Until The End - Breakin Benjamin
Here We Are - Breakin Benjamin
Everytime - Britney Spears
I Will Follow You Into The Dark - Death Cab For Cutie
Madi Don't Leave - PlayRadioPlay
The Good Life - Weezer (not tears so much as makes me feel awful)
Life Is Like A Boat - Rie Fu
Will Of The Heart - Shiro Shagisu
Sadness And Sorrow - Toshiro Masuda
Toki Wo Koeru Omoi - ?
Rose's Theme - Murray Gold
Love Rescue Me - Onehundredhours
Let The Rain Come - Simon Brading
Hallelujah - ?
Hallelujah - Leonard Cohen
<insert numerous soundtacks from sad songs/shows here>
Oh and the whole Elfen Lied soundtrack doesn't make me cry so much as scares the carp carp outta me.
I know some of them are awfully clichéd/bad songs but don't judge me. XD They're just the ones (that I can remember) that tear me up. There are probably a load of R&B or Pop type ones as well that I can't remember because I haven't listened to them in years. ^^;