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Is Kim Kardashian rebounding from her messy marriage with one of her greatest loves?

Kardashian, 31, and Reggie Bush -- whom she dated on-and-off for three years before splitting in early 2010 -- were spotted brunching with pals at the Beverly Hills Hotel two days before Valentine's Day.

After a friendly hello kiss, "They were catching up and laughing a lot," a source tells the new Us Weekly, out now.

Indeed, the twosome have been catching up a lot lately. "Reggie and Kim have been talking since she split with Kris," another source explains of Kardashian's 72-day marriage to Kris Humphries. (NBA star Humphries, 26, is still seeking an annulment based on fraud.)

Miami Dolphins running back Bush, 26, is "comforting to her," the source says. "But they are trying to be private about it."

For much more on Kim and Kris' reunion -- and why her family and friends are "dead set against them dating" -- pick up the new Us Weekly, on stands Friday.