I think this is the one:

I'VE FOUND SOMEONE OF MY OWN
The Free Movement

I got up this morning
While I was having my coffee
My woman came in, sat down by my side
With tears in her eyes
She said ´I´ve a confession to make.´
I said ´Woman, speak what´s on your mind.´

She said ´I´ve found somebody new
To take your place.´
´I said don´t feel so all alone
I´ve found someone of my own.´

´All those lonely nights
You left me all alone
My true love would call
And talk to me on the phone.´
I said ´Woman, if that´s the way it´s gotta be
Then darlin, don´t you worry about me.´

She said ´ I´ve found somebody new
To take your place.´
´I said don´t feel so all alone
I´ve found someone of my own.´

I got up from the table
Reached down and wiped the tears
From her face
I put out my cigarette
Turned and walked away

She said ´I´ve found somebody new
To take your place.´
´I said don´t feel so all alone
I´ve found someone of my own.´