This is an old country western song. Female vocalist. The theme is lost love---
she still loves him and wishes things had gone differently, but they are both
now involved with others and their lives have gone in different directions.  
Much of the song is spoken instead of being sung.

I think the song may have been "Slowly" by Jimmie Dean and Dottie
West.  However, I cannot locate the lyrics online.

Best regards,
journalist-ga

Thanks for your comment, but I do not remember any male vocalist being on it.

rdepee,

I don't mean to be glib, but your description covers a sizable
percentage of country music. Can you remember any other details that
might help us to narrow it down? Snippets of lyrics?

- Hammer

Ha ha. 

I am trying to find this country western song about
this guy who finds his wife cheating on him so he
drives his pickup to the bar and gets drunk.

To Hammer:
      Thanks for your comment.  I cannot remember any other details,
just a heartfelt female expressing her regret for missing
the romantic opportunity of a lifetime.
                                   rdepee

Just to try to jog your memory...

Country songs of this type often have a tagline. They have a clever
lyric that is repeated in every verse and chorus, but they change the
meaning. For example, the lyric "How can I help you to say goodbye?"
in the first verse in spoken by a mother to her child, in the second
verse to a husband by his wife and, in the third verse by a
grandfather to his grandchild. Can you recall if your song had
something like this?

- Hammer

To Hammer:
      Thanks for your comment.  I remember no tagline, no clever
lyrics, just a heartfelt expression of words spoken, not
sung. Maybe part of it is sung.  I don't think the lyrics even rhyme
very much.
                                         rdepee