Suicidal : 45 - Shinedown
Going through a tough time : Sorgens Kammer - Del II- Dimmu Borgir
Guys who are heart brokened : The Maelstrom Mephisto - Dimmu Borgir
Lonely : Walk with me in Hell - Lamb of God
Worthless - When Will this End - Korn
someone died - Starting Over - Saliva

Suicidal : Katrina & The Waves - Walking On Sunshine
Going through a tough time : Lighthouse Family - I Wish I Knew How It Would Feel To Be
Guys who are heart broken : Billy Bragg - A New England
In Love: Toploader - Dancing In The Moonlight
When you moved away from your gf/bf : Feeder - Yesterday Went Too Soon
Lonely : Natasha Bedingfield - These Words (a little queer of me but I really enjoy this song)
Worthless : Aretha Franklin - I Will Survive
Someone Died : Amos Lee - Colors (ft. Norah Jones)

And a couple more
Satisfaction: Beach Boys - I Get Around
In the mood to dance: Elvis vs JXL - Little Less Conversation
Sleepy: Debussy - Clair De Lune
Another one for in love: Toots and the Maytals - It must be true love

Suicidal : October Leaf - Allyptic
Going through a tough time : Bottled Up Inside - Korn
Heart broken : Solar Wake - Autumn
Lonely : Underneath The Veil - Wolfsheim
Worthless : 3 Libras - A Perfect Circle
Someone dies : Funeral March - Chopin -OR- Moonlight Sonata - Beethoven

Satisfaction: (I Can't Get No) Satisfaction - The Rolling Stones (nothing else came to mind.)
In the mood to dance: Weird Science - Oingo Boingo
Sleepy: The Nurse Who Loved Me - A Perfect Circle
In love: All Around Me - Flyleaf (Even though it's about God, and I'm anti-religion. It's a good song, and is easily interpreted as a love song.)

Adding a few.

Rockin' Out : Sick Love Song - Motley Crue
Trying To Stay Awake : Fly - Blind Guardian
Anti-Social : Slaying The Dreamer - Nightwish
Concerned about the world : Goodbye Blue Sky - Pink Floyd
Numb: The Autumn - Lullacry

Suicidal : Giving In- Adema
Going through a tough time : Don't Stop Dancing- Creed
Guys who are heart broken : Tangerine- Led Zeppelin
In Love: Don't Wanna Miss A Thing- Aerosmith
When you moved away from your gf/bf : We Belong Together- Gavin DeGraw
Lonely : Creep- Radiohead
Worthless : Spoke in the Wheel- Black Label Society
Someone Died : Tears in Heaven- Eric Clapton
In the mood to dance: Hold On Loosely- 38 Special
Sleepy: Quicksand- Sleeping At Last
Feel like screaming : Brackish- Kittie
Rockin' Out- Coming Undone- Korn
Concerned about the world : Imagine- John Lennon.. or The World I Know- Collective Soul
Numb: Comfortably Numb- Pink Floyd

Rockin' Out : Toots and the Maytals - Do The Reggay
Trying To Stay Awake : Above and Beyond - Can't Sleep
Anti-Social : Sex Pistols - Pretty Vacant
Concerned about the world : Snow Patrol - Open Your Eyes
Numb: White Stripes - Little Acorns

frustrated: slipknot-vermillion
in love:good charlotte-wondering
dance mood: ?- peanut butter jelly time!!!!
rocking out: raise against-prayer of a refugee