Massa scored just two points across the first four races but bounced back to finish in the top ten in every race since the Hungarian Grand Prix, taking two podiums in Japan and Brazil.
"In the first half of the year, I was worried about renewing my contract," said the Brazilian.
"I did not think that Ferrari would really wait right to the end of the summer before deciding on the driver line-up for next year."
"It’s true that ever since I’ve been at Maranello, there have always been rumours about me: already in my first year there was a list of drivers who were supposed to take my place and it was the same this year, with a lot of names and plenty of speculation."
At the start [of 2012], I paid too much attention to these things, but then, in August, I told myself I should only think about racing and having fun and so I began to really drive, to have the right feeling with the car and to drive as quickly as I know how."
"Now I feel very strong and the results were there to see in the last nine races: so I am optimistic for the future, mine and Ferrari’s."
Massa finished 2012 in seventh place in the championship.