Tiger Woods’ alpha mistress, Rachel Uchitel, said the 9/11 death of her former fiance, investment banker James Andrew O’Grady, was meant to be. “I believe Andy was meant to die because he was too good,” she tells Page Six Magazine, in The Post on Thursday. “I’m almost happy it ended the way it did because I’ve learned so many lessons from him. It would have been tragic if we got into fights and then divorced.” Had O’Grady lived, Uchitel — who went on to reportedly make $500,000 a year working as a VIP hostess at Tao Las Vegas and at New York’s The Griffin, where she met Woods — believes her life would have been much different. “I would be a fat housewife with three kids in Sands Point, LI,” she tells the magazine. The toned and tanned Uchitel recently sold her Park Avenue apartment and plans to move to San Francisco with her boyfriend, Matt Hahn. The two are talking about children. “I never wanted them … but I know how much I love my dogs, and I think I’d make a good mother to my own kids.”