"I don't know Elena," was all Stefan said as he walked. To where? Back to camp, to Rebekah, he was torn between where to go. He'd like to think that his brother would have insisted on going back to camp, going to see him and Elena, but there was that part of him that would throw himself back into the fight, at whatever costs. Stefan turned slightly, heading west, pulling Elena along - holding onto her for dear life.
Everything that Stefan had been pushing aside for years felt as though it was rushing back to him and he tried his best to keep it all in check, but his voice, the urgency, the frustration, the fear .. it was all there in the way he spoke to Elena. He knew the last time they'd been to see Damon. He always knew, but the thought of him being alive wasn't helping him think clearly.
Mainly because if Damon was with Lucy, and they were going to try to get Scott and Allison back, that meant there was a possibility that Stefan could lose him this time.