Unlucky-in-love “Jersey Shore” star Nicole “Snooki” Polizzi has dumped boyfriend Emilio Masella after accusing him of “using her for fame.” She learned Masella was trying to land a role on MTV’s “Real World.” While muscled fitness trainer Masella initially claimed he fell for Snooki because of who she is, not her TV persona, a source told us, “Snooki realized he was just after fame all along. She ended it last week.” Masella yesterday announced on Twitter, “Back on the market.”