Britney Spears beamed about her new album and her relationship with boyfriend/agent/minder Jason Trawick at a birthday dinner in West Hollywood the other night for a friend of Trawick’s — but said little of a rumored engagement. Spears walked in hand-in-hand with Trawick to the dinner at Palihouse, where she mingled with Paris and Nicky Hilton. A source reports, “Britney and Jason looked very happy, but there was no talk of an engagement.”