Actually in this case there is no reason for Ronaldo to leave especially for Roma.
Even though it's the worst possibility now that Ronaldo has moved from MU, it's clear that his choice is not Roma.
The reason is quite clear, he wants to gain experience and doesn't want to be separated from the Champions League and Roma certainly can't do that so why would he leave if he still can't be in the Champions League.
If Ronaldo leaves for Roma (although chances are slim ) he might not be too worried about playing in the champions league. He might be yarning for a different adventure in the Seria A. So far Ronaldo has achieved a lot that one more season of not lifting the CL trophy might not mean much to him. He could have something bigger he is hoping to achieve with José Mourinho. Perhaps if Ronaldo remains in united he won't still play in the champions league
Lol, if Ronaldo moves to Roma it doesn't mean anything, if the target is just to play then it would be better to stay at Manchester United because Roma and Manchester United are neither part of the Champions League next season. Ronaldo became uncomfortable at Manchester United for not getting into the Champions League and also, previously Ronaldo had revealed that Ronaldo's return to Manchester United was to compete on the title track not to compete in the middle of the table. Therefore, if the expression is like that then moving to Roma is not the best way because it is only a setback for Ronaldo.
A Ronaldo I know he always keeps his word, yes he is responsible for paying for what he said when he joined Manchester United. Even though he couldn't make it happen at least he helped the club for it. But judging by now Ronaldo will still stay at Manchester United. I think it proves that he will still be in the city of Manchester.