The midfielder is on a season-long loan at Roma from the Gunners.
He told Four Four Two: "I know my qualities and what I can do. Maybe I could not accept being on the bench in some games. I am 30 years old and I like playing football, not sitting on the bench to waste my time.
"The loan is for one year, but everything is possible and I don't close the door. Now, I'm happy with Roma. At the end of the season, we'll discuss and decide what to do."