Britney Spears has been left devastated after splitting from her boyfriend Jason Trawick, it's been reported.

Trawick, the singer's long-time agent, is understood to have called time on the relationship after Spears refused to get more serious.

"It's all over and Britney is beside herself. This is the first person Britney has really loved since Kevin Federline,” a source told The Daily Mirror.

“He was a really stable influence on her."

The source added: "Britney was dragging her feet. She's still fragile - she loves him but she didn't want to rush into anything.

“But now it has and backfired and Jason is out of the picture."

Neither Trawick nor Spears, who were first romantically linked to each other in the spring, ever confirmed they were in a relationship.