Britney Spears has been dumped by boyfriend Jason Trawick after it became clear that the pop star was desperate for him to commit to her.

"It was just too fast, too soon for Jason. He didn't like the pressure Britney and her family were putting on him to put a ring on her finger. He told Britney repeatedly that he would never marry, but she refused to believe him. She thought she could change his mind by having a baby with him," femalefirst.co.uk a source as saying.

"Jason told Britney he needs time to chill away from her. She's heartbroken," added the source.

Although they have now separated, Spears, who was first romantically linked to Jason in March, was seen wearing a diamond ring on her engagement finger while shopping in Beverly Hills last week.

The singer was earlier married to Kevind Federline and has sons Sean Preston, 3, and Jayden James, 2, with her ex-husband.