Can I say for 100% certainty that he doesn't feel as we do about the club? no, I cannot say that. But I didn't actually say him specifically, I'm talking about professional footballers on the whole.
That said, I VERY much doubt he loves City in the way you think. It's one of the huge beliefs many fans have and 99.99% of the time it's misguided. They are simply not like us. They see City in a totally different light to us, they work at the club, their entire perspective is different than ours. Even if they are supporters of the club before they join, they will leave with a different view of City than that of a fan - simply because they've been on the inside. You can never look at Paul McCartney in the same was a fans does if you know him personally or have worked with him - because the mystique is gone, you don't have a fan's perspective anymore.
I have little doubt he has attachment to us - because he's been with us for the best part of 10 years, but it's not the same as being a fan and never will be. He won't be buying a season ticket to follow us, and he won't be irritable when we lose. He won't be trying to check the scores when he's on holiday, or looking up a gossip column to see who we 'might' be signing in some journalists vivid imagination.
He may well be attached to City, but he is not one of us - a fan. He never will be like one of us, and he will never feel as we do. That's just as true for Colin Bell and Mike Summerbee too. I'm not saying they aren't fans, or that they think less of City, but they simply don't and cannot have the same experience that we do because of who they are.