I don't think Ronaldo is happy with the situation of the club right now, I mean check out the club performance in their last games, then you will have to know what the dude is going through. Though we all know he has a lot of love for Manchester United, and he has been showing it even on the pitch. But with the team recent performance I think it's damaging his reputation, a player like Ronaldo to play in the Europa league wasn't expected from me, due to his level in the game, he is really sacrificing for the team, his reputation is at stake here. So If Manchester United continue like this I think he might leave the club.
this is what I mean, because indeed he will definitely think about his future as well, especially this can be said to be his last period because he is almost finished as a professional footballer and I still feel it is impossible for him to sacrifice the ambition that he has always had. uphold the club MU now even though MU is his love.
it's too hard to see this happening even though the possibility is always there
I wouldn't put it past him to change clubs again because he has been dealt a bad hand twice now. Real Madrid was a great team to play for, he shouldn't have changed that, look at how awesome they are right now. I get that Real Madrid took 100 million for him, which is a great deal for them, but Ronaldo could have simply refused if he wanted to.
Juventus had their first ever non-champion year in Serie A for the past 10 or so years when he joined, and ManU is not doing so well neither, not looking good for the future neither. He would have to talk with the manager of course, but he could leave. Going back to his first ever club, at Lisbon could be a great deal for him, both to retire and to be in his home nation as well.