The actor is allegedly feeling ''replaced'' since the former 'Friends' actress started dating her 'Cougar Town' co-star Brian Van Holt.
Though David - whose divorce from Courteney was finalised in May - has told friends he's happy for his former spouse he is actually struggling to come to terms with her romance.
A source told RadarOnline.com: ''He's always been bad with hiding his true feelings, inside, it's killing him to see her with a new best friend. His status is taken over ... He feels replaced.''
The 41-year-old star - who spent four weeks at the Betty Ford Clinic in January 2011 to be treated for alcoholism - has seemingly relapsed into drinking in recent weeks, and was spotted downing whisky at Popkins Tavern in Richmond, Virginia and later went to a strip club.
Courteney - who originally split from David in 2010 - and Brian have been dating for around six months and the couple were recently spotted on a date at West Hollywood's Chi Lin restaurant, where a witness said they ''acted like boyfriend and girlfriend'' as they dined with Courteney and David's nine-year-old daughter Coco.
Martha is soon caught in the middle of a hitman war.
It's been 15 years since Zoolander hit movie screens in 2001.
After his starring turn in The Green Lantern tanked at the box office, critics were surprised that Ryan Reynolds was pushing for a solo movie based...
Shot on a plane in zero gravity, the video features OK Go's usual levels of choreography with a few surprises thrown in for good measure!
Rebel Wilson has taken the world by storm after arriving in America five years ago.