The Enquirer adds that the LA songstress has been stressed about planning a massive celebrity wedding and is rethinking her commitment.
'She's accomplished a lot in her life, but there's still a lot she wants to do - and Miley doesn't want to have to answer to anybody,' the insider added.
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Miley and Liam, 28, met while filming the 2010 romance The Last Song and first got engaged in May 2012.
The couple then called it quits in September 2013, but reunited in January 2016.
Neither Miley or Liam have responded to the National Enquirer's claims.