“Jersey Shore” star Vinny Guadagnino is ready to be the next Leonardio DiCaprio. Recounting a recent conversation with the “Shutter Island” star, he tells Interview magazine, “[Leo] said, ‘I can tell you’re a good Italian kid, from a good family.’ . . . He handles everything with such poise. He’s very low-key, and I’m the same kind of way. When you see me in a club, you don’t see me going crazy; you see me with a hat and a hood on, laying back.” Guadagnino added, in what may become a classic quote, “What would Leo do? What would Leo do? I keep reciting that in my head.”