there's a song I like by them but only heard it once.  the song is about being lovers one night and friends the next day.  what's the name of the song?

This is my favorite DMB song.  It is called Say Goodbye.  It is a great song.  The song before it on Crash, #41, flows right into Say Goodbye.

Here are the lyrics.

So here we are tonight, you and me together
The storm outside, the fire is bright
And in your eyes I see what's on my mind
You've got me wild, turned around inside
And then desire, see, is creeping up heavy
Inside here and know you feel the same way as I do now
Let's make this an evening
Lovers for a night, lovers for tonight
Stay here with me, love, tonight
Just for an evening
When we make our passion pictures
You and me twist up secret creatures
And we'll stay here
Tomorrow go back to being friends

Go back to being friends
But tonight let's be lovers
We kiss and sweat
We'll turn this better thing to the best
of all we can offer, just this rogue kiss
Tangled tongues and lips, see me this way
I'm turning and turning for you
Girl just tonight

Float away here with me
An evening just wait and see
But tomorrow go back to your man
I'm back to my world and we're back to being friends
Wait and see me
Tonight let's do this thing
All we are is wasting hours
Until the sun comes up it's all ours
On our way here
Tomorrow go back to being friends

Go back to being friends
Tonight let's be lovers, say you will
And hear me call, soft-spoken whispering love
A thing or two I have to say here
Tonight let's go all the way then
Love I'll see you,
Just for this evening
Let's strip down, trip out at this
One evening starts with a kiss
Run away here
And tomorrow back to being friends
Lovers, love, lovers
Just for tonight, one night
Love you
And tomorrow say goodbye