He didn't look happy during last game.. I'm sure that he knows that he's leaving. The truth is that he's not Barcelona quality even if he is a very good player.
Knowing that Vdbosque called him for the spanish team a few months ago, his dream is to go to Brazil but with the playing time he gets at Barcelona, he has no chance. For this reason, I think that he'll leave in january on loan for 6 months or that we'll sell him.
Personally, I think that we should keep him until June, knowing that we don't have a lot of depth in our wingers (When Messi is injured, we only have Pedro/Neymar/Alexis with one sub, Tello) .