Thompson Richard - I Misunderstood Chords

I Misunderstood, by Richard Thompson, from the album Rumor and Sigh
The chorus has a little more going on than I've transcribed here, but
the bass line is mostly hitting a Bb.  I play the riff and then a Bb on
the low E and sometimes a D on the A string as well.

Gm Dm Gm C Csus C
Dm        Bb             C
She said, darling I'm in love with your mind
Dm          Bb           C
The way you care for me, it's so kind
Dm      Bb      C                      G    Gsus G
Love to see you again, wish I had more time
Dm      Bb              C
She was laughing as she brushed my cheek
Dm            Bb              C
Why don't you call me, angel, maybe next week
Dm      Bb              C                 G
Promise now, cross your heart and hope to die

CHORUS
Riff A
E-1--3--5--5--5--3--------|
B-1--1--3--3--3--3--------|
Riff A  /Bb
        But I misunderstood
        But I misunderstood
        But I misunderstood
  G                           C
I thought she was saying good luck
                   Dm    Bb  C
She was saying goodbye
Riff A  /Bb
        But I misunderstood
        But I misunderstood
        But I misunderstood
  G                           C
I thought she was saying good luck
                   Dm    Bb  C
She was saying goodbye

Gm Dm Gm C Csus C

Things I try to put shine in her eyes
Wire wheels and shimmering things
Wild nights when the whole world seemed to fly
She said, the thing that's so unique
When we're together we don't have to speak
We'll always be such good friends, you and I

CHORUS

She was saying goodbye
She was saying goodbye
She was saying goodbye