It happened AGAIN to me: the awkward moment when a person repeats a word or phrase to let me know that he/she thinks that I have misused or mispronounced a word. Some of the ones which I have personal experience of people doing this: my use of: peridot, chamomile, clematis, deign, demonstrable, banal, and then BETWEEN YOU AND ME.
I actually had someone TRY to correct my saying "between you and me" by asking: "Shouldn't you say between you AND I?" I answered, "Perhaps you do not realize that the use of a preposition--between-- requires that one use the objective case which requires using me rather than I."
She is very humorous with the serious subject. She wrote: "My fondest hope is that just looking at the title you will learn to say fearlessly 'between you and me' (not 'I'), whether or not you actually buy the book and penetrate the innards of the objective case." Oh, yes, I DO penetrate the innards, Mary!