James Blunt "facing relationship trouble"

James Blunt's relationship with the girl who inspired You're Beautiful is in trouble, say reports.

Camilla Boler, the singer's girlfriend of 18 months, has apparently told friends she can no longer cope with his non-stop travelling.

"She is at her wits' end," one of Boler's friends told the Sunday Mirror. "She loves James - but in her heart of hearts she can't see how they can have a future together when he's always jetting around the world."

Following his Brit Awards success, Blunt has embarked on a nine-month world tour. He is currently playing 21 dates in the United States.

A music industry source was unsurprised the star's schedule was causing personal problems. "James's career rise has taken everyone by surprise. This is the time to strike internationally and that means him travelling all over the world," he explained. "But Camilla has not been with him - so it's no surprise the relationship is under strain."