Jason Trawick Sayonara, Britney ...

5/21/2011 6:00 AM PDT

Britney Spears -- Jason Trawick Is No Longer Her Manager, But They're Still Dating

Jason Trawick has cut ties with Britney Spears ... but only professionally, TMZ has learned.

Sources close to the couple tell TMZ ... they are still doing great together, but Jason has decided to step aside as her agent. 

Trawick has left William Morris Endeavor to create an arts and entertainment division for a company called Famos LLC, whose partners include musicians Dave Stewart and Mick Jagger. The company will specialize in promoting artists who have a digital reach.

Please Jason … don't sign Rebecca Black.