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  (PHOTO) Facebook: Jennifer Aniston Fan Page
  Jennifer Aniston and Justin Theroux in Paris

Justin Theroux recently spoke out about his relationship with Jennifer Aniston and while he insists that he is happy with the actress, new reports suggest that he misses his ex-girlfriend of 14 years, Heidi Bivens.

Theroux, who reportedly dumped Bivens immediately before dating Aniston, is currently on vacation in Paris with the 43-year-old and he recently opened up about their relationship.

"I always go to bed thinking I'm the luckiest guy in the world," Theroux told "Extra" adding that he "couldn't be happier" with Aniston.

The couple were photographed site seeing and enjoying a romantic meal at Ristorante Le Stresa while in France and although they appeared to be in good spirits while out in public, new reports suggest that it is a different story behind the scenes.

"[Justin] hates being approached by fans every time they go out," an insider told InTouch magazine. "He feels like he's living in a fishbowl."

Theroux, who had reportedly known Aniston for five years before they began dating in 2011, allegedly misses his circle of friends, including Bivens.

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"He misses hanging out with his artist friends and their intellectual conversations," the insider explained.

"He really misses [Bivens]. He feels like he's lost his best friend, and now he thinks they should stay in touch," the source added.

Aniston has spoken out about her relationship with Theroux in the past and appears to be growing more and more serious about the actor.

"Yes, I'm very happy. I'm extremely lucky, and I'm extremely happy," Aniston said on "Good Morning America."

The former "Friends" actress sold her Beverly Hills mansion for $38 million shortly after she began dating Theroux and in January 2012 the couple purchased a home together in Bel-Air, Calif. for approximately $22 million.

Aniston was previously overheard telling friends that she is ready to take the next step with Theroux, and even boasted that she would be married before the end of the year, according to the New York Daily News.