"Rob has always had a love-hate relationship with his career. He loves earning millions from acting, but he hates the constant intrusion into his private life," showbizspy.com quoted a source as saying.

"He has more than enough money to live very comfortably for the rest of his life. Quitting Hollywood is something he has talked about. When he found out Kristen had cheated, he opened his eyes - people in showbiz just aren't very nice," the source added.