Torres has struggled at Chelsea since his move from Liverpool and at the worst moments out of the team admits the depths he dropped to.
"Halfway through last season, I distanced myself from the values I had grown up with," Torres told El País.
"I had team-mates who didn't care if the team won or lost because they were not playing. I never wanted to be like that. [But] one day I discovered that I was like them, that it didn't matter it we won or lost if I was not playing.
"I wasn't part of the group. I discovered that I was not happy because I had stopped being what I had always wanted to be. In the dressing room, you can never lose that group concept."