The pop star, who is approaching his 18th birthday, also discussed the pressure of coming of age in the spotlight in a new interview with America's V magazine.
'People need to know I'm not a kid anymore,' he admits, adding that he's 'not completely grown-up' either.
'I'm still learning,' he says.
Becoming a man: Justin Bieber opened up about his growing up in the spotlight in a new interview with V Magazine
'I'm not going to try to conform to what people want me to be, or go out there and start partying, have people see me with alcohol. I want to do it at my own pace.'
While he may be transforming from a boy to a man, don't expect him to change his squeeky clean image.
'I don't want to start singing about things like sex, drugs and swearing,' said the heartthrob, who is dating Selena Gomez.
'I'm into love, and maybe I'll get more into making love when I'm older. But I want to be someone who is respected by everybody.'
While he recently got a tattoo of Jesus on his leg, he insists: 'I don't consider myself religious. I haven't been to church in a long time.'
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The teen sensation made headlines with the large tattoo of Christ's face on his calf - but downplays his beliefs.
Bieber admitted that going to church does not play a part in his life, although he talks to God in private.
'I don't think I'm religious. I am spiritual,' Bieber told the fashion magazine.
'I believe that Jesus died on the cross for my sins. I believe that He put me in this position, and that I have to always give Him the glory He deserves for putting me here.
'But I don't consider myself religious. A lot of people who are religious, I think they get lost. They go to church just to go to church.
'I'm not trying to disrespect them - you know, whatever works for you.
'But for me, I focus more on praying and talking to Him. I don't have to go to church.'
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He admitted: 'I haven't been to church in a long time, but I know I have a relationship with Him. I talk to Him, and that's all.'
Instead, Bieber seemed keen to push his skills as a pugilist.
'Not religious': Bieber, who recently got this Jesus tattoo on his calf, says he hasn't been to church in a long time
'Yeah I box. Me and my friends box all the time,' he bragged.
'My dad is a fighter so he taught me some stuff growing up, and he's a great fighter, so I'm a pretty good boxer.'
He compared his plight as an entertainer fighting for respect with that of Floyd Mayweather Jr.
'Now that I'm on top, everyone wants to bring me down. Everyone's trying to tug at me and take my spot,' he said.
'Like Floyd Mayweather, he's the best boxer in the world. Now he is a champion. Every time he goes to a fight now, people are like, 'He's going to lose this time'.
'Every time he wins. And people aren't ever going to know that he's a champ.'
He said he also looks to the controversial fighter for inspiration on how to stay on top in his own profession.
'Floyd Mayweather trains every day, even when it's off season,' he gushed. 'When everyone else just chills he's in there punching bags because he wants to be the best. He wants to be better than Ali.
'I'm going to be honest - I'm young and I'm not as disciplined as I need to be. If I have a day off, I need to be in the dance studio, but instead I'm hanging out with my friends.
'But when I'm in my 20s need to buckle down and work as hard as these other people.'
And he admits he is aiming high - as high as can be.
'Eventually, I want to become the best at what I do. I want to be the best. In the world,' he said.
'I want to be better than anybody that's ever done it. I don't want people to think of me as just a teen sensation.
'I want to transition, and become the greatest.'
He knows some people will be hard to win over - but has confidence that his talent will be enough to win over the haters.
'A lot of people say they hate Justin Bieber who haven't listened to any of my music,' he admitted.
'They just hate me because the hate the idea of me. I'm young, I'm handsome - I don't mean to sound conceited - but they think I just got here because of that.
'I feel the more put out, the more people will realize it's really good music. I'm not worried about the guy fans because they are going to come.'
He added: 'It's not a fluke that I'm here. I'm here for a reason, and I'm here for a lifetime.'
He also insists that he is not worried about having many of the troubles that his idol Michael Jackson faced after finding fame at such an early age.
'Michael had a really bad childhood,' he said. 'I was blessed with a great childhood.
'Maybe Michael missed out on a lot, so he tried to live his childhood when he was older.