The 23-year-old is a graduate of the German giants' youth academy and has established himself as one of the best players in the Bundesliga.
"It is not an eternity until 2015," he told Kicker. "Right now I feel great here and could consider staying longer.
"But everyone who knows me is aware I am open for new experiences. Right now, there is no reason to consider it as the club's perspective is very good."
Kroos has scored four goals in 35 international appearances for Germany.