I've decided to go about this by listing my favourite song first, and then listing each of my favourite songs in order of their group/singers name.
I think these songs cover a large scale of different emotions and my guess is after viewing this page you'll find at least 1 song to describe your current emotions. Or at least come out of this with a whole wack of awesome msn names. ^.-

My Favorite Song
I watched a change, In you, It's like you never, Had wings, Now you feel, So alive, I've watched you change...
I took you home, Set you on the glass, I pulled off your wings, Then I laughed...
I watched a change, In you, It's like you never, Had wings, Now you feel, So alive, I've watched you change, It's like you never, Had wings...
I look at the cross, Then I look away, Give you the lungs to, Blow me away..."
Adema
AFI
All 4 One
All Saints
Amanda Marshall
American Hi-Fi
Ashanti
Blink 182
Bradtson
This is a rather old band, which few people have even heard of. I myself, don't listen to their songs much. But everytime I go back over this song I'm amazed by how much the lyrics tug at my heart every single time.
Cauterize
Celebrity
Celine Dion
Chester Bennington
Coldplay
Creed
Dashboard Confessional
I love this songs! They are what have been deemed an "emo" group, and thats exactly what I find thier music does. It touches on your emotions and describes exactly how they feel with the perfect words. Definitely my kind of music. Yet, I don't listen to it much because these are often the emotions they sing about are rather depressing at times...
David Usher
Default
Dirty Vegas
Disturbed
Earshot
Econoline Crush
Edwin
Elbow
Eminem
Evan And Jaron
Faith No More
Fefe Dobsom
Filter
Finch
Finger Eleven
My favourite Band
Five For Fighting
Foo Fighters
Fuel
Goo Goo Dolls
Good Charlotte
Green Day
Greenwheel
Hoobastank
It's going to be hard for me to not list every song they have ever created because this band rules.
Hootie And The Blowfish
Incubus
Jacksoul
Jessica Riddle
Jimmy Eat World
Kelis
Korn
Led Zepplin
Lenny Kravitz
Linkin Park
I'm just going to basically list every song they have ever made...
Live
Lonestar
Mariah Carey
Matchbox 20
Matthew Good Band
Mest ft. Goldfinger & Good Charolette
Millencolin
Moist
Natalie Imbruglia
No Doubt
Oasis
Our Lady Peace
Pacifier
Papa Roach
Pearl Jam
Pilate
POD
Puddle Of Mudd
Red Hot Chilli Peppers
Ronan Keating
Saliva
Saves The Day
Selena
Serial Joe
Silverchair
Simple Plan
Sinch
Slipknot
SR-71
Staind
Sting
Switchfoot
System Of A Down
Take That
The Tea Party
The Used
Three Doors Down
Tommy Lee
Trapt
Travis
Treble Charger
Trust Company
Unloco
Unwritten Law
Yoko Kanno