There could trouble in paradise for reunited couple Ed Westwick and Jessica Szohr. The “Gossip Girl” co-stars were seated separately at the Knicks game Wednesday night and then left separately. He sat under the basket with a guy friend and she sat center-court with a girlfriend, a spy said. Later in the evening, Westwick was seen at SL sharing a table with a mystery blonde. After whispers and deep eye contact, the two left the table together and didn’t return. A rep for Westwick didn’t get back to us.