The “Jersey Shore” house just keeps getting smaller and smaller…

Just days after Vinny left the Seaside Heights beach house after getting into an argument with another cast member … it looks like Mike “The Situation” Sorrentino has followed in his footsteps and has also decided to head home early!

An insider tells US Weekly:

“Mike walked off the show. He’s so over the whole thing. I don’t think he’s coming back. Everyone in the house is so unhappy.”

The rest of the cast, which includes Nicole “Snooki” Polizzi, Ronnie Ortiz-Magro, Sammi “Sweetheart” Giancola, Paul “DJ Pauly D” DelVecchio and Deena Cortese, recently returned to Seaside Heights, NJ after filming in Italy to start taping Season 5.

Jersey Shore’s Italy-set episodes premiere August 4th at 10 p.m. on MTV.