The Portuguese forward has been the subject of intense speculation since admitting he was "sad" at the Bernabeu for professional reasons back in September.
But in an interview with Spanish newspaper AS, he stressed his commitment to Madrid.
He said: "I feel great and I'm convinced that this year will be better than last year. I'm feeling good and ready to do my best, as always, and to be better than last year."
When asked about his contract, Ronaldo stood firm, adding: "That subject has already been spoken about. I won't talk about my contract renewal any more, it's not important.
"The most important thing is winning our next matches. We are contesting La Liga, the Copa del Rey and the Champions League and it's important that we all stick together.
"Right now I'm feeling more comfortable with the fans, not just at the Bernabeu, where I've always felt good, but outside too.
"They have shown me a lot of love. I want to pay them back in the best way possible, which is playing well and giving my all for the shirt and helping Madrid get to the top.
"We want a perfect start to the year. We are at home, we are the favourites and we need to start well."