05/31/2007 at 02:00 PM EDT
's been single since her October split
from Vince Vaughn
– but she may have a new man in her life.
The former Friends
star, 38, spent Memorial Day weekend getting cozy with a handsome mystery man with dirty-blond hair.
Although his identity remains in question, one thing's for sure: During a romantic dinner at Santa Monica's One Pico restaurant in the Shutters Hotel on Saturday, he had the actress's undivided attention.
At 8 p.m. the pair slipped into the beachfront eatery with Aniston's man gently rubbing her back as they waited for a table.
For the next three hours the duo talked by candlelight over a bottle of San Pellegrino, leaning in close and, at one point, even holding hands across the table. (Her rep had no comment on the dinner date.)
Still, it's not as if Aniston needs a man to be happy. She seemed content to fly solo the next day at a local beach bash, palling around with neighbors Courteney Cox
, David Arquette and their daughter Coco.
Later, back at the Cox-Arquette abode, Aniston mingled with about a dozen guests while her pooch Dolly barked at the holiday commotion.
"[Jennifer] is doing so good," longtime friend Kathy Najimy recently told PEOPLE. "She's fantastic. Couldn't be better."