I always thought the lyrics to the song "Wild Horses" by the Sundays that Buffy and Angel danced to at the end of "The Prom" fit them well.
"Wild Horses" The Sundays
Childhood living is easy to do
It's things that you wanted, I bought them for you
Graceless lady, you know who I am
You know I can't let you just slide through my hands
Wild horses couldn't drag me away...
Wild horses couldn't drag me away...
I watched you suffer a dull aching pain
Now you decided just to show me the same
No sweeping exits or offstage lines
Can make me feel bitter or treat you unkind
Wild horses couldn't drag me away,
Wild, wild horses couldnm't drag me away...
Faith has been broken and tears must be cried
Let's do some living after we die
Wild horses couldn't drag me away...
Wild, wild horses couldn't drag me away...
Wild, wild horses... we'll ride them someday...
Wild, wild horses... we'll ride them someday...
Doesn't that describe B/A from Buffy S1 through S3?