Use of pronoun "myself"

When I went to school one was required to use the personal pronoun "I" as the subject of a sentence (nominative case) and the pronoun "me" as the object of a sentence (objective case). Now it seems like everbody in both speaking and writing uses the reflexive pronoun "myself" in place of both "I" and "me"  so they don't have to figure out which is right. Since common use trumps what was formerly considered "correct" English, has this happened with "myself'?  This has already happened with "It is me" having replaced "It is I".

has this happened with "myself'?

No.  Not yet!  I still hear lots of people use "me".

Would you like to go out for some pizza with my wife and [me / myself / I]?

You'll hear all three.  Only me is technically correct, of course.

CJ