this is the chords if you want to use real chords (not power chords)
G
Started on a summer Sunday
C
Your pink dress on the setting sun
G
You were going to Grandma's house,
C
I was too scared to come
Bm C
My silly girl, I'm beggin you
D
Tell me all the things that I want to hear
Bm C G
My silly girl, I'm in love with you
G
I had to run to catch you,
C
You always moved so fast
G
With your cute little smile and your silly laugh,
C
God gave me love at last
Bm C
My silly girl, I'm beggin you
D
Tell me all the things that I want to hear
Bm C G
My silly girl, I'm in love with you
[ Tab from: https://www.guitartabs.cc/tabs/d/descendents/silly_girl_crd_ver_3.html ]
Bm C
They said just stay away
Bm C
Right now I wish I had
Bm C
I'm so in love with you,
Bm C
my silly girl
G
They made me go away
C
Sometimes life just isn't fair,
G
but I'll be back someday
C
I hope you'll still be there
Bm C
My silly girl, I'm beggin you
D
Tell me all the things that I want to hear
Bm C G
My silly girl, I'm in love with you
G
When you're just a silly boy like me,
C
you're always so scared
G
Now I'm just out of luck,
C
I wonder if you ever cared
Bm C
My silly girl, I'm beggin you
D
Don't stop being a silly girl
Bm C G
My silly girl, I'm in love with you
Bm C
They said just stay away
Bm C
Right now I wish I had
Bm C
I'm so in love with you,
Bm C
my silly girl