here are the lyrics as i now understand them....

Note. 1st verse was missing on mp3.

I DON'T KNOW WHY I JUST DO
Recorded by Bill Boyd

Your letter just reached me this morning
As much as you say we are through
But there's something that makes me still love you
I don't know why but I do

It seems it's the same old sad story
You have oft times told me before
But somehow this time it is different
You say that you love me no more

I can't understand little darlin'
Now that you've proven untrue
There's something that makes me still love you
I just don't know why but I do

I know I could find many others
For they meet me with smiles everyday
But never a one can replace you
I guess God just planned it that way

You say you now love another
You say that our romance is through
I pray that you'll always be happy
I just don't know why but i do

I'll answer your letter tomorrow
Returning the ring that you gave
I'm keeping the picture that you sent me
I'll take it with me to my grave

Somewhere in a cold silent churchyard
Someday you may stand at my grave
Your thoughts may then wander back darlin'
To someone your love could have saved
[word thoughts unclear]

Goodbye good luck and may God bless you
In closing I'm telling you true
Though you've broken my heart I still love you
I just don't know why but i do