The goalkeeper's form has been under persistent scrutiny during the past 18 months following a handful of high-profile blunders and a dismal performance with Spain at the World Cup last summer.
However, Carlo Ancelotti reinstated him as undisputed No.1 across all competitions ahead of 2014-15, which drew ire from supporters who thought summer signing Keylor Navas deserved to start.
With Ancelotti having since been sacked this week and David de Gea linked with a big-money move this summer, speculation remains rife that Casillas will ultimately be forced to leave the club - but he admits he cannot envisage doing so.
"I want to face the season with the belief I have always had over the years, that's the passion for this position that I have,” he told Cadena SER. "I'll be in this goal next season and I do not imagine leaving the Real Madrid.
"I would hold off another goalkeeper because I am competitive. But there will never be a problem between myself and Real Madrid.
"What I want and desire is for the good of those who come to the Santiago Bernabeu, the people who call this club their home. It's not the typical brown-nosing flattery, it is the truth.
"I'm a very emotional person and I let the whistling get to me too much, though I never went home crying. But yes, I was angry at the response."
When put on the spot about Manchester United No.1 and Spain international team-mate De Gea being brought in, he added: "De Gea is an awfully nice guy and I'm used to his presence."
