It’s Jen and Ben, again. Superstars Jennifer Lopez and Ben Affleck are engaged, Lopez revealed Friday night. Lopez on Twitter teased a “major announcement” to be made to her inner circle. Members of that group could get the message on OnTheJLo.com. Inner circle members saw a clip of Lopez admiring a huge, green diamond on her ring finger. Jenny from the Block almost made it down the aisle with Affleck before. The Bronx beauty and hunk raised near Boston, met on the set of the film “Gigli,” a movie bomb that brought an explosion of passion in its stars. They were engaged to be married in Septem…