Looks like there could be trouble in paradise for Gossip Girl co-stars Jessica Szohr and Ed Westwick. “They are still together, but things have seemed very tense between them the past few weeks,” explains an insider, who says Jessica’s been unable to hide her emotions on set. And a crew member recently witnessed Jessica in tears returning to her dressing room. Making matters worse, Ed doesn’t seem concerned with his girlfriend’s feelings. On January 29, he and a friend were seen entertaining two ladies at the Melrose Bar & Grill in LA — and Jessica was nowhere in sight. “It looked like he was on a double date,” says an onlooker. According to an eyewitness, Ed and a friend took off with two girls after dinner in LA.