Name That Tune

How many songs do you “know”, but “don’t know”? This tune suddenly appeared during my harmonica practice. I knew the melody. I knew that it was a love song from a show or movie, but I didn’t know the title or most of the lyrics or who sung it. Can you place it? Here’s a big hint.

Name-that-tune

First person to peg it in the comments gets 10 points. And you know what points mean!

Jim