Looks like a rough patch for Gossip Girl co-stars Jessica Szohr and Ed Westwick.

They're still together, but things have seemed very tense between them the past few weeks, explains an insider, who says it's even spilled over onto the set.

Jessica’s been unable to hide her emotions on set, reports In Touch, citing a crew member who recently witnessed her in tears while in her dressing room.

Making matters worse, Ed doesn’t seem concerned with his girlfriend’s feelings.

On January 29, the British actor and a male 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, and according to an eyewitness, Ed and a friend took off with two girls after dinner in LA.

Is it curtains for Gossip Girl's Ed Westwick and Jessica Szohr?