It's I believe

When I opened your letter yesterday
I could not believe my eyes
'Cos I've already given all I have to give
And I think it must have slipped your mind
But I remember not so long ago
I gave it all, it's gone
And I gave it all to you
Now I'm living on borrowed time, but it's mine

Oh, d'you hear me?
I cannot believe it's true
Are you really doing the things you do.
No I cannot believe it's you, really you

Oh these people I'm talking to don't understand
They don't seem to realize
They're listening but they're not hearing me
They're being too cruel to be kind
Any kind of feeling that I had is gone
'Cos I gave it all, it's gone
And I gave it all to you
Now I'm living on borrowed time, but it's mine

Oh, d'you hear me?
I cannot believe it's true
Are you really doing the things you do.