The Spain international is currently enjoying his football at the Allianz Arena after a 20million euros move from the Nou Camp in 2013.
He has made over 150 appearances for the Bavarians in all competitions and helped them win the Bundesliga title on four occasions.
However, the 26-year-old admits he could return to the Spanish giants in the future.
"Barcelona will always be my home, I have great affection not only for the club but for the city too," he told Catalunya Radio.
"I am really happy at Bayern so I cannot say if I will definitely return but football changes a lot in a short space of time and anything can happen. Last season I renewed my contract with Bayern but there is a possibility that the club and me differ in the directions we wish to take."