Justin Bieber's manager Scooter Braun has opened up about his strained relationship with the troubled teen star, revealing the singer has become increasingly difficult to deal with over the last year as he rebels against his handlers. The Baby hitmaker's bad boy behaviour has made him a regular in the headlines in recent months, with antics that have included becoming embroiled in nightclub spats, arguments with his neighbours, brushes with police and leaving fans waiting for hours at his concerts. Braun has now admitted he has been at odds with the 19-year-old star over his behaviour, and has struggled to keep him on the right path. He tells The Hollywood Reporter, "When Justin was younger, it was, 'Keep him out of trouble, stop him from falling down, protect him as much as you can from anything that can hurt him'... When I try to do that now, he's resentful, he pushes away and rebels. What I've come to learn is: 'Be there, give the best advice you can, but he has to be allowed to make his own decisions - and his own mistakes.' "I saw the rebellion, I saw our relationship being hurt. We were struggling in talking to each other because I wasn't having conversations about anything good anymore. It was constantly calling to say, 'No!'" During the joint interview, Bieber agrees with his manager's observations, adding, "Scooter was like the father figure in my life. But when I started to grow up, it was hard for him to have to listen to my input. I want to be me, to show everybody who I am as an individual. I don't want to just be a puppet." However, Braun is adamant his charge is not going to burn out in the same manner as other former child stars, adding, "Justin's not going to go crazy. He's not going to end up in rehab. He's not going to end up a statistic. Nine months ago, they said he lost his mind - he hasn't missed a show since." Bieber insists he doesn't care about the public's opinion of him, saying, "I don't give a f**k... I don't give a f**k what they say... I know who I am and what I'm doing in my life and what I've accomplished and continue to accomplish as a performer, as a writer, as an artist, as a person, as a human being. I'm happy with the man I'm becoming."