North Carolina head coach Bill Belichick says transitioning to college football has been a constant learning experience for him.

"I learn every day, and I've learned so much being back in the college environment, whether it be recruiting, the college game, the rules, the hashmarks, some strategy, and just putting a team together. I've learned a lot," Belichick said Friday during an appearance on "Good Morning America" to promote his new book, "The Art of Winning."

Belichick's relationship with 24-year-old girlfriend Jordon Hudson has attracted much scrutiny, but the 73-year-old coach reiterated Friday - echoing comments made earlier this week - that she "doesn't have anything to do with football."

"She's been terrific through the whole process, and she's been very helpful to me," Belichick said. "She does the business things that don't relate to North Carolina that come up in my life, so I can concentrate on football, and that's really what I want to do."

Belichick declined to get into further details, saying he didn't want to discuss personal relationships but confirmed that he's happy.

North Carolina athletic director Bubba Cunningham praised Belichick earlier this week following a report refuted by the school that it had banned Hudson from its facilities, calling him "an incredibly focused person."

Belichick, who won six Super Bowl titles with the New England Patriots and racked up 333 NFL victories, took the Tar Heels coaching job in December.