The 24-year-old made his first team debut in 2008, and has since become a key cog in the midfield, winning three Liga titles as well as two Champions League trophies along the way.
"Everything has gone by so quickly and the truth is I never imagined I’d win so many titles," the Spain international stated at a press conference.
"I’m very happy. My role has been important, I’ve played a lot, and I would never have imagined it. I hope I’ll have many more years with Barca and win many more titles."
Busquets then discussed the importance of fellow midfielder Thiago Alcantara, who returned to match action in the 4-1 win over Getafe at the weekend.
"He is a very important player and we’ve missed him. It’s obvious that he brings a lot to the team and that he has got power and quality. He is very young and he will be very important," he added.
Barcelona currently sit at the top of La Liga with 12 points from four games.