There's no particular song that completely embodies my opinions of love, but there are quite a few lyrics.

Iris - Goo Goo Dolls

I'd give up forever to touch you, 'cause I know that you feel me somehow.
You're the closest to heaven that I've been and I don't want to go home right now.

(Those are the only words from that song that mean anything to me)

I'll Be - Edwin McCain

(Chorus)
Tell me we belong together, dress it up with the trappings of love.
I'll be captivated. I'll hang from your lips instead of the gallows of heartache that hang from above.
I'll be your crying shoulder. I'll be love suicide.
I'll be better when I'm older. I'll be the greatest fan of your life.

Reason - Hoobastank

(Chorus)
I've found a reason for me to change who I used to be.
A reason to start over new and the reason is you.
I've found a reason to show a side of me you didn't know.
A reason for all that I do and the reason is you.

Don't Want to Miss a Thing - Aerosmith

(Chorus)
I don't want to close my eyes, I don't want to fall asleep
'cause I'd miss you, babe, and I don't want to miss a thing.
'Cause even when I dream of you, the sweetest would never do,
I'd still miss you, babe, and I don't want to miss a thing.