Ozzy Osbourne on Sharon -- VERY POSITIVE ... Sorta Delusional

Good news -- Ozzy Osbourne says things are going GREAT in his effort to fix the problems in his marriage.

Bad news -- He's sorta refusing to acknowledge there were problems in the first place.

Ozzy was finishing up a grocery run at Bristol Farms in L.A. yesterday when we asked about his relationship with Sharon ... and Ozzy sounded extremely positive.

As we previously reported, the two were living apart earlier this year after Ozzy fell off the wagon and began using drugs and alcohol again. Sharon told reporters she was "devastated" by his behavior.

So it was a little baffling yesterday when Ozzy told us there was never a problem to begin with between himself and Sharon ... because we know that's simply not true.