It has been one battle after another when it comes to Leonardo DiCaprio’s dating life . But the Oscar winner, 50, is still going strong with Italian model Vittoria Ceretti , 27, after two years together. Despite typically dating women under the age of 25, DiCaprio broke his rule with his latest flame. Insiders are crediting this change to the “Inception” vet’s mom, Irmelin Indenbirken. “Vittoria’s quite different to the other girls he’s been with,” a source told The Sun . “She was harder to