Aguero admits that he considered about moving back to Argentine side Independiente this summer.
Independiente suffered a relegation last season and Aguero considered returning to the club in order to help them get back into the Argentine top flight.
"I love Independiente and when they were relegated I even thought about moving back there," he told the Sun.
"I wanted to help the club to go up again. I definitely thought about it, but my agent told me City would have killed us if we had.
"I know my job is at City, I am just saying the thought passed my mind when Independiente went down.
"I've been very happy at City since the day I came but I'm definitely going to back Independiente, in a few years as I want to finish my career there."