EXCLUSIVE: CANCER STRICKEN RYAN O’NEAL has months to live, say insiders as Ryan reveals his inner-most thoughts to The ENQUIRER.

O’Neal, 71, recently received the shocking news he has Stage 4 prostate cancer – a virtual death sentence.

Ryan’s putting on a brave public face, but a close source confided: “He has just four months to live and says the only bright spot is that he’ll be seeing his beloved Farrah Fawcett again.”

Ryan, the star of “Love Story” and “What’s Up Doc?” has been devas­tated ever since Farrah’s  death in 2009, and he revealed that he’d like to ask her forgive­ness for never marrying her during their 30-year relation­ship.

“I’d like to apologize to her,” he told The ENQUIRER. “I adore Farrah. I miss her so much. It’s torture! I still live in the house where we lived together. Everything that’s nice here she got for me.”

Talking with amazing candor, Ryan also confided exclusively to The ENQUIRER that he’s actually battling three types of cancer – chronic myelogenous leukemia, which has been in remission since 2006, pros­tate cancer that has reportedly spread to his bones, and a touch of skin cancer on his nose.

“They keep slicing it and slicing it till they don’t find any more cancer cells,” he said about the latter.

But by far his most severe problem is the advanced pros­tate cancer, despite his recent public statement announcing that “the prognosis is positive for a full recovery.”

The close source said: “Ryan knows that the odds are against him. Stage 4 is really bad news. He’s getting his affairs in order, and says, ‘I’ve made my peace with God. I’m ready to join my beloved Farrah now.’

“Ryan wants to be buried next to Farrah in Westwood Village Memorial cemetery.”

Dr. Jerome Spunberg, a radia­tion oncologist from West Palm Beach, Fla., told The ENQUIRER that Stage 4 means the cancer has spread to other areas of the body, most commonly into the bone, and is incurable.

Despite the grim prog­nosis, the feisty actor, who lost his beloved Far­rah to anal cancer at age 62, intends to put up the fight of his life to beat his own disease and remains confident.

“He doesn’t believe his cancer is so advanced that he should give up,” said the source. “Poor Ryan. He can’t totally come to grips with his condition.”

Ryan told The EN­QUIRER he’s found a top specialist in Ventura County, Calif., and will have the tumors in his prostate frozen when he goes in for a one-day procedure on May 10.

He admitted he’s “not look­ing forward to the treatment,” but is remaining upbeat.

Ryan added: “Hopefully I’ll still be able to chase women! They are not removing anything. They are only freezing the tu­mors, and then they die.

“They are not freezing the surround­ing body parts – but they are close, as close as you can get. I’ll be really cold down there.”