The whole song is just going back and forth between Bb and Eb.  With capo, you can put 
on the third fret and play G and C shapes, with an Am thrown in a couple times

(Capo 3)

G                               C
You can put a stick in my spokes
G                              C
I can be the butt of your jokes
G                           C
I can be the laughing stock, I can be the hoax
      G              C
But I ain't gonna lose you
     G             C
No I ain't gonna lose you


G                              C
They can come and tear my house down
G                          C
They can run me out of town
G                  C
They can tie me up, call me a clown
      G             C
But I ain't gonna lose you
      G            C
No I ain't gonna lose you
Am
I can't stand the thought of another man
      G            C
No I ain't gonna lose you

They can make me turn my back on my friends
Send me away to san quentin
Put me in the hole, a thousand times again
But I ain't gonna lose you
No I ain't gonna lose you

Throw me in a hurricane
Tell the whole world I've gone insane
Run an electric shock to my brain
But I ain't gonna lose you
No I ain't gonna lose you

Am
I can't stand
The thought of another man
     G            C
No I ain't gonna lose you
     G            C
No I ain't gonna lose you
(G)         (C)
Ain't gonna lose X4

I'll sing it from my roof top
I'll sing it from the bus stop
I'll sing it on the street drunk to a cop
But I ain't gonna lose you
No I ain't gonna lose
Ain't gonna lose you
Ain't gonna lose


peace,
Erik Lyon