The Serbian international joined the Bundesliga side in January after being a bit of a flop at Old Trafford, but has played his part in keeping the side from a relegation battle. Tosic has scored four goals in his last three games.
On leaving Old Trafford he said: ''I believe I haven't had my final say at Manchester United and that my performances with Cologne will be my ticket back to Old Trafford.”
But now he has made a u-turn and says he wants to stay.
"I could live here, but it is up to Manchester United," he said.
"If it was up to me I would stay."