Unlucky-in-love Jennifer Aniston 'splits' from rocker boyfriend John Mayer

The former Friends star, 39, and Mayer have reportedly split because the 30-year-old musician can't commit to the relationship as much as the actress would like.

The pair, who started dating earlier this year, opted for a trial separation earlier this week.

Single again: Jennifer Aniston in Los Angeles on Wednesday, shortly after her split from boyfriend John Mayer

A source told People.com: 'They had a great time together but they are just in different places in their lives right now.'

But a friend of Mayer's told the website the couple could reconcile at some point in the near future.

He said: 'He never ends things with a clean slate. He likes to dwell on these relationships and sort everything out before saying goodbye for good.' 

Man about town: John Mayer heads to the recording studio in Los Angeles on Wednesday

Since her 2005 divorce from Brad Pitt, who left her for his Mr and Mrs Smith co-star Angelina Jolie after four years of marriage, Aniston has yet to find a suitable partner to settle down with.

She dated comic actor Vince Vaughn, who she met on the set of The Break-Up in 2005, for nearly a year before having a brief relationship with British model Paul Sculfor.

Mayer, meanwhile, has dated a string of beauties including Jennifer Love Hewitt and Jessica Simpson.

As they were: Back in May, Aniston and Mayer enjoyed a swimming pool frolic in Miami