"That's...bad. That's really, really bad. I mean, I figured things weren't going good on the ship, because it came back and abducted all the StarCrossed members, but...I hope you and Jeff are going to be okay."

Then, to clarify why he's worried about Kurt still, he adds.

"I've heard that when people go back to their universes, they go back to where they were before they were taken. With no memory of ever being here."

So he won't even know Kurt and Jeff are on Earth to even try to help them.