The midfielder has been heavily linked with a move away from the club but says he is focused on helping the Giallorossi bounce back from a disappointing season last year
The 30-year-old has attracted a host of suitors with Real Madrid, Paris Saint-Germain and Chelsea having all been in the frame for the midfielder's signature.
Roma star Francesco Totti has urged the Italian to stay at the Giallorossi, however, and De Rossi says he is ready to ensure the club improve on last term's sixth-placed Serie A finish.
"The last few seasons have not gone well, that is clear," De Rossi told reporters.
"What we need is to be reborn. And we start from here, in pre-season. This is the preparation for a revival ahead of an important year.
"The club has always been a strong one, even in the years that things didn't go so well.
"However, something has been missing or else we wouldn't have had these seasons that were not too positive.
"We are not missing that much at Roma, but we are lacking a little. What we really need is enthusiasm. We need to put a winning run of games together and start to believe in ourselves again."
De Rossi - who has been a Roma player since graduating from the club's youth ranks in 2001 - has been used in a variety of positions throughout his career.
And the Italy international says he is happy to play anywhere for new coach Rudi Garcia.
"I do everything. I've always done that. I've never made myself unavailable for a particular tactical solution," he said.
"I've played as a playmaker, a ball-winner, even as a defender. I think that has been under-estimated."
Roma open the Serie A season away to Livorno on August 25.