Jennifer Aniston pal claims Justin Theroux was in a relationship when they met

“Justin will never marry her,” a close friend told InTouch Weekly Magazine. “He’s not the marrying type – as you can see from the 14-year relationship he was in that didn’t end in marriage.”

“He is not the kind of guy to be owned,” the source adds.

The insider claims that Theroux was still “very taken” when he “met and fell in love” with Aniston, referring to his past 14-year relationship with Heidi Bivens.

“He totally lied to Heidi and broke her heart,” the informer says.

In addition, a friend fears that the differences between their characters will be an obstacle in their relationship.

“Jen is the complete opposite of Justin,” the friend explains. “She’s all about Malibu and shopping and trying to stay young while Justin is about being an artist.”

Theroux reportedly even declined an offer to star in the hit sitcom Friends, which turned Aniston into a celebrity, saying that he would “hang himself” if he got tied into a 7-year TV contract.

However, the pair seems to be going strong, with recent rumors claiming that the two are trying for a baby.

“This is the guy she wants to grow old with. She is head over heels in love with him,” the friend adds.