OWEN WILSON on the verge of a breakdown after dumping his baby mama!

The “Wedding Crashers” star refused to commit to girlfriend Jade Duell and plunged into a downward spiral after she moved to New York with their infant son, sources say.

“Poor Owen is a mess,” a family friend told The ENQUIRER.

“He cries all day and blames himself for ruining his life again. He loves his son Robert more than anything, and he’s kicking himself for not giving his relation­ship with Jade enough time.

“With his history of suicide at­tempts, his family is terrified to leave him alone. They’ve rallied around him at his Malibu es­tate.”

Hollywood was rocked when Owen – devastated after split­ting from actress Kate Hudson – took an overdose of pre­scription pills and slashed his wrists in August 2007. Sadly, he’d reportedly tried to kill himself twice before.

But the Butterscotch Stallion, 42, rebuilt his life and flipped for former air mar­shal Jade, 29, in 2009. She gave birth to their son on Jan. 14 at Owen’s $8 million Maui home.

GET the full story behind Owen’s abrupt split and his pals spiraling fears for his health ONLY in the new NATIONAL ENQUIRER – on sale NOW!