Opening Credits:
"Rocket Man" by Elton John

Waking Up:
"I Want You" by Savage Garden

Falling In Love:
"Misty" by Gackt

Fight Scene:
"My Body Is A Cage" by The Arcade Fire

Breaking Up:
"Motherland" by Crystal Kay

Getting Back Together:
"La Redecouverte" by Yann Tiersen (from the Amelie soundtrack)

Secret Love:
"Strip My Mind" by The Red Hot Chili Peppers

Life's Okay:
"Ame nochi Hare" by Mr. Children

Mental Breakdown:
"When the Levy Breaks" by Led Zeppelin

Driving:
"Storm" from KA (Cirque du Soleil)

Flashback:
"I Want You, I Need You, I Love You" by Elvis Presley

Partying:
"Suck My Kiss" by The Red Hot Chili Peppers

Happy Dance:
"I'm the Man Who Loves You" by Wilco

Regretting:
"Farewell" by Gackt

Long Night Alone:
"I Closed My Eyes" from Secret of Mana

Death Scene:
"Buddy Holly" by Weezer

Ending Credits:
"La Noyee" by Yann Tiersen (from the Amelie soundtrack)

Wow, I'm quite surprised; seven of those tracks actually fit perfectly! O__O