My late father who sang snippets of many '20s ballads to the cows from an early age reputedly, often sang this one when I was young [some 50 + years back].
The refrain he applied to the end of each stanza was a little different:
'Lindy dat's de way I love you
Lindy Lou oh Lindy Lou mah darlin
My little Lindy lou'

But that may be due to imperfect interpretation of the lyrics most likely gleaned from radio, or an arrangement he came up with.