In a bombshell resignation letter to the New York-based Riverkeeper group last month, Kennedy writes he was packing it in because he now lives in California and the "weekly commute has been hard on my family."
But a source insists Bobby "had to quit" because his "personal life is coming apart at the seams. He has to do something to save it before it's too late."
The admission by the son of Robert F. Kennedy confirms recent reports his two-year union with Curb Your Enthusiasm beauty Cheryl is already on the rocks!
Kennedy, 63, married third wife Cheryl, 51, in August 2014 — two years after the suicide of second wife Mary Richardson Kennedy, mother of four of his children.
The bubbly sitcom beauty soon realized she was "in over her head" with the unending dramas in the serial cheater's family, spies dished.
"She wasn't just getting him, she also got his crazy family, including his six troubled children!" says a Kennedy insider.
Cheryl reportedly had a "horrible" time connecting with Bobby's troubled kids Conor, 22, and Kyra, 21, whose outrageous antics have exploded in scandal.
Conor, who dated Taylor Swift in 2012, was jailed after a drunken brawl outside an Aspen, Colo., nightclub last December.
And Kyra's a member of the notorious "Snap Pack" — a group of spoiled rich kids who post photos of their wild parties on social media.
At 19, she was booted from a New York nightclub for flashing a fake ID and screaming: "I am a Kennedy. Google me!"
Her furious father shut down Kyra's Instagram and Snapchat accounts last year after she "cyberbullied" a magazine writer.
Now, womanizer Bobby's trying to keep a lid on the wild ones while battling to "salvage things with Cheryl," says the source. "She must be very concerned he'll go back to his wanton ways!"
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at firstname.lastname@example.org, or call us at (866) ON-RADAR (667-2327) any time, day or night.