This is an old song, but may be the one you're after. Let's see if I can remember it

Tears on my pillow each morning
Tears that I cried over you
When I should be sleeping
I just lay there weeping
wondring if you're weeping too

I'm trying so hard to forget you
but that's not so easy to do
with tears on my pillow each morning
tears that I shed over you.

That's all I remember. If you'd like the guitar chords, let me know, and I'll figure them out for you.