John Mayer plays the field Aniston-less

Jan 30, 2009, 9:50 GMT

The former \'Friends\' star - A source said: "John was talking to the girl, who was really cute - she was very animated and excited. As the dinner went on, John moved around the side of the table to be closer to her. Jennifer won\'t be happy." © Albert L. Ortega / PR Photos

Jennifer Aniston's on-off boyfriend John Mayer has been seen canoodling with a beautiful blonde woman.

The 'Gravity' singer - who spent the night at the 'Friends' actress' Los Angeles home on Monday (26.01.09) - was reportedly seen snuggling up to the unidentified beauty at Santa Monica's Marix Tex Mex restaurant on Wednesday (28.01.09).

A source said: "John was talking to the girl, who was really cute - she was very animated and excited. As the dinner went on, John moved around the side of the table to be closer to her. Jennifer won't be happy."

It is not the first time John, 31, has been spotted with the woman, and the pair did little to hide their romantic feelings for each other.

Another source explained to In Touch Weekly magazine: "They were obviously on a date. He came in with her another time too. He gave her a long kiss before they left.

"John has been here six times in the last two weeks but never with Jennifer."

John and Jennifer began dating last April, but split in August, before rekindling their romance in October.

Since they reunited, there have been numerous reports they are set to wed, with John rumoured to be planning a romantic proposal on the star's 40th birthday on February 11.