Speaking ahead of the release of his personal portrait film "Ronaldo", the FIFA World Player of the Year told Reuters TV that he is "not a fake person."
"I have my style, he has his style, his own style," he said of Messi, his great personal rival.
"We have to respect that people compare all the time.
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And it is normal, we are compared since we are babies, I don´t mean me and Messi but all the persons in school. Who is more clever, who is more fast, it´s normal, it´s part of the life.
"It does not surprise me any more but some times it makes me tired because it´s always same thing and they still repeat and repeat, one year, another year, every year."
Critics say the Portugal forward's celebrations sometimes have an air of arrogance about them.
Ronaldo is never shy to show his rippling muscles or make defiant gestures after scoring. He startled the audience at this year's World Player of the Year award by bellowing "Sim" (yes) into the microphone after he was announced as the winner.
Asked why people may dislike him, Ronaldo said: "Maybe the way I am, my personality, the way I see football. I´m not a fake person. It´s normal, it´s part of the business. No one can control that,"
Ronaldo's film, due to be released on Nov 9, depicts the striker as a family man and shows how he lives on the pitch and inside his luxury house in the neighbourhood of La Finca in the outskirts of Madrid.
In a separate interview with the BBC, Ronaldo described himself as "unbelievable on the pitch."
"I don't need to say 'I'm in the history of football, I'm a legend'. The numbers say everything," he said.
"I have to say to be in my shoes is not easy. But I'm not complaining. I just want to say that. I feel happy. All this happens because of a reason. The reason is I'm unbelievable inside the pitch."
"This is why the people have so much interest on me. So it's as simple as that. I'm good, I'm happy, I'm motivated all the time. I'm very professional and I want to carry on like that."
(Writing by Brian Homewood, editing by Pritha Sarkar)
