The Serbia international is enjoying his second season-long loan at the Bundesliga side and has become an influential figure in the German capital.
He told the Berliner Morgenpost: "We will see. We'll get together after the season.
"I don't want to look for excuses, but we have already had two coaching changes and the situation is not easy for the new coaching staff", Grujic said.
"Everyone has their own ideas, we tried a lot this season, always something new."