Opening Credits:
"Who Knew" by P!nk
(Oh... This will end up sad, I know it. o_o)

Waking Up:
"Vacation" by The Go-Go's
(I am sensing a pattern.)

Falling in Love:
"Orange Crush" by R.E.M.
(Awesome. My falling in loves theme song is about a poisonous gas they used in Vietnam. My love life will be awful. XD)

Fight scene:
"Radio Song" by Superbus

Breaking up:
"I'm So Sick" by Flyleaf

Getting back together:
"Color of Your Spoon" by Olivia Lufkin
(...Aw. I actually like the sound of this song for getting back together. <3)

Secret Love:
"Counting Blue Cars" by Dishwalla

Life's okay:
"Hero" by Chade Koreger featuring Josey Scott

Mental breakdown:
"Grapefruit Tea" by Olivia Lufkin
(Okay. Any song called 'Grapefruit Tea' has mental breakdown written all over it. Just by default.)

Driving:
"Breakfast at Tiffany's" by Deep Blue Something

Flashback:
"Memories" by Within Temptation
(OH MY GOD HOW PERFECT. DX)

Partying:
"I Wanna Dance With Somebody (Who Loves Me)" by Whitney Houston

Happy dance:
"SexyBack" by Justin Timberlake

Regretting:
"How to Save a Life" by The Fray
(Another perfect one! Glee!)

Long night alone:
"Zombie" by the Cranberries

Death scene:
"I Don't Care Anymore" by Phil Collins

Ending credits:
"Maps" by the Yeah Yeah Yeahs
(Oh no, a sad song. D: )