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When Robert Pattinson joked to Jimmy Kimmel Aug. 22 that he's "homeless," he wasn't exactly kidding.

Although the British actor, 26, re-emerged earlier this month to gamely promote his new film Cosmopolis, things are definitely not back to normal over a month after discovering girlfriend  Kristen Stewart was cheating on him with her Snow White and the Huntsman director Rupert Sanders.

Pattinson is reportedly "selling" the posh Los Feliz home in Los Angeles that Stewart, his Twilight costar and girlfriend of three years, moved into nearly a year ago. "He said there are too many memories," a source close to Pattinson told US Weekly.

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Although Stewart has been splitting her time with BFF Scout Taylor-Compton in Burbank, Calif. and with her parents in L.A.'s Woodland Hills nabe, she hasn't yet officially moved out of the $6.3 million house, which Pattinson bought in September 2011. Once owned by ER star Noah Wylie, the abode is "on an acre and a half of land and has a 150-person screening room and amazing gardens," according to a source.

A second insider adds that Pattinson and Stewart "are talking" in the wake of her fling with married Snow White and the Huntsman director Sanders, 41.

"Rob doesn't hate her and he's not mad . . . He just doesn't get why she did it. He loves her and thinks about her constantly."

Stewart, meanwhile, is "close to a total meltdown," according to another source. "She isn't sleeping and she stays up all night crying."