Ronaldo was interviewed after training by United legend Paddy Crerand on Friday night for the clubâ€™s TV channel MUTV.
Asked if he would ever like to come back to Old Trafford, Ronaldo said: "Well of course, it was one of my favourite clubs.
"I loved it there, I was 18 years old, I win everything there, the people treat me like a god there so I appreciate and the future nobody knowsâ€¦
"Itâ€™s crazy that they still sing my name.
"I remember when we played there against Manchester in the Champions League, they killed me, my heart was so happy, and fantastic moments and I appreciate this club, for me itâ€™s one of the best clubs in the world and I have passion for this club.
"Of course Iâ€™m happy at Real Madrid. Itâ€™s my home, itâ€™s my club but Manchester treat me unbelievable so we never know."
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