That was a hit in the fall of 1971. A year later, when I was in the Occidental College band, we performed that tune.
Dennis Coffey is probably the greatest guitarist nobody knows of.
Chances are, if it’s a Motown song, and there’s guitar on it, it’s Dennis. And he’s a white boy.
Don’t know if it was actually a chart hit, but I know it received considerable air play. A nice melancholy tune...
https://www.youtube.com/watch?v=u_8Zi4GafyI
Lonely (Amy’s Tune) - Lovin’ Spoonful