Jake and Kirsten done for good?

The romance between Kirsten Dunst and Jake Gyllenhaal finally appears to be hitting the skids. "Jake is looking for a way out," a source close to the Tinseltown couple tells Star People. "He says he's getting tired of Kirsten's constant partying, and I think he regrets getting involved with her again." And Jake, who first dated her from late 2002 through July 2004, has killed Kirsten's idea of moving in together, the source says. "They're definitely heading for a breakup. Jake is sick of hearing about Kirsten flirting with other guys." Making matters worse, Kirsten, 23, hasn't been returning Jake's phone calls while she's on a promotional tour for her movie Elizabethtown, the source says. When she finally did, it was at 4 a.m., leaving miffed Jake, 24, to tell her to go to bed already. Then again, maybe Kirsten is pushing him away for a reason. Another source tells Star People, "Kirsten seems to be seriously contemplating revisiting her relationship with Tobey Maguire [30]. Kirsten's been waxing nostalgic about Tobey, and I think she sees their reunion on Spider-Man 3 as a chance to see if there are still sparks." Her rep denies she has the hots for Tobey, adding that they're "just friends." [Excite]