But it’s OVER for Kevin Costner and longtime live-in Christine Baumgarten — she got packed and UNSHACKED! Pretty blonde Christine, 27, dumped Kevin because — surprise! — he got wandering eyes again! Amazingly, she’d managed to tame the star into a stay-at-home beau — and he was even calling her “his wife.” But suddenly, the 47-year-old actor turned back the clock to Party Time — hanging out with his single buddies, drinking, carousing and womanizing into the wee hours, Christine told insiders — and she flipped! She angrily warned him: I’m NOT putting up with this! In a final emotional sit-down, the couple agreed: It’s time we took a breather! Christine immediately packed her possessions, headed for the door — and Kevin let her go . . .