Musician John Mayer is rumoured to have ended his three-month relationship with the former 'Friends' actress because of long-term commitment issues.
Friends say tension between the couple lead to a trial separation, but other sources suggest Jennifer, 39, has already moved on and is dating male model Matt Felker - who starred in the video for Britney Spears' song 'Toxic'.
A source close to John, 30, told a British newspaper: "John is still mulling over their relationship. He likes to have some space before deciding it is definitely over. But he may be too late. If these rumours that she is dating a model are true, he will be really upset."
John and Jennifer were reportedly planning to move in together after his present tour ends in September and marriage was even rumoured.
However, despite reports the pair were ready to settle down, the relationship apparently broke down because John felt he couldn't commit to Jennifer's plans. A source said: "John took the decision to end things as he felt he just wasn't ready for the level of commitment that Jennifer deserved.
"Contrary to reports, Jennifer didn't want to have kids or marry this year, but she did want to set a timetable for their future together. She also wanted him to assure her he would cut down his tours in the future when they did eventually have children."
Jennifer has had a rocky love life.
Former husband Brad Pitt left her three years ago for his 'Mr. and Mrs. Smith' co-star Angelina Jolie. Since her divorce, she has dated Vince Vaughn and male model Paul Sculfor.
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