A Catholic elementary school in Bergen County is closing at the end of the school year in June after 65 years of teaching students in Wayne, church officials said Friday. Immaculate Heart of Mary School in Wayne has been grappling with a “significant enrollment decrease” in recent years, according to the Rev. Mateusz Jasniewicz, who heads to parish. “With declining enrollment and rising costs, the parish of the Immaculate Heart of Mary is no longer able to bear the costs associated with a school. The increase to tuition required to keep the school operational is prohibitive,” the Diocese of Pa…