The "Vanderpump Rules" stars have been married for 2 years -- Scheana says she filed divorce docs Wednesday in L.A. She tells TMZ, "We might have failed at our marriage, but we are committed to succeeding as friends and will continue to support each other's personal happiness and professional success."

Everyone saw this coming. We broke the story ... earlier this month, Michael went MIA after she claimed he cleaned out their bank account. He's battled addiction in the past, but claims he's been sober since January. We're told Scheana fears he fell off the wagon.