Is Justin Theroux 'Not Good Enough' for Jennifer Aniston?

For the past couple months, the tabloids have been claiming there's trouble in Jennifer Aniston and Justin Theroux's relationship. There have been reports that she's issued a proposal ultimatum, she's worried he's a cheater, he's getting back together with Heidi Bivens, she wants to rekindle her romance with John Mayer, he's pissed that she's upset about Brad Pitt's engagement to Angelina Jolie ... And now the pair supposedly have another problem.

According to Now, Justin is "having a crisis of confidence" and fears "he can't live up to her standards." (Uh, what standards? Jennifer tends to go for douches -- John, Vince Vaughn, that Cougar Town actor who called her his "sport f---" and, some would argue, Brad -- so Justin seems to be just her type.) In fact, Justin has told Jennifer, "I'm not good enough for you."

Justin apparently "snapped" when Jennifer insisted he sell the two-bedroom house in Hawaii he bought back in 2007 because she wants them to get a "bigger and better" place there.

"He's adapted so much of his lifestyle -- from his wardrobe to his interior décor tastes -- to make Jen happy," a "friend of Justin's" dishes to the mag. "She's even replaced all his sheets and linens ?in his New York apartment. Now she's hunting around for ?a Hawaiian holiday home because she thinks his existing one there is too small."

In Jennifer's defense, Heidi once lived in Justin's New York apartment, and it's not hard to imagine a new girlfriend wanting to replace the sheets an old girlfriend slept on. So Jennifer gets a pass on that, if it's true.

This isn't the first time it's been reported that the two have clashed over interior design; supposedly they will actually live in different wings of their house. But he's hardly changed his wardrobe -- he's still wearing the same hipster threads he had before they got together, the only difference being he shaved that awful mountain-man beard (which was supposedly for a film role anyway).

But would Justin really say something like "I'm not good enough for you"? Sure, he tries really hard to give off an "edgy," too-cool-for-school vibe. But he doesn't seem to mind living off all of her Friends money, and he also seems incredibly eager to use their relationship to get ahead in Hollywood, from the signing with her agency to the try-hard breakdancing appearance on Ellen to the spray tan and mascara he wore to the Wanderlust première. At some point, all that effort could take a toll and he could snap. But he seems perfectly happy to let her drive the bus, a la Jessica Simpson's baby daddy Eric Johnson. Maybe that's what Justin really is -- the balding, middle-aged, hipster K-Fed to Jennifer's Britney.

What do you think? Is Justin Theroux "not good enough" for Jennifer Aniston? Are the tabloids full of it? Sound off in the comments!