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In December’s Cosmopolitan, Jessica Simpson says Tony Romo is different from past men she’s romanced — including ex-husband Nick Lachey.

“I’d always fall for guys I wanted to save,” she says. “For the first time, I fell in love with someone who saved me.”

She says she wouldn’t rule out wedding the Dallas Cowboys quarterback, whom she began dating last year.

“I think any person who I’m gonna date for longer than six months, I definitely am investing in something long-term,” she says. “If I get married again, then it will be the last time.

“Nick will always be a part of my life,” says Simpson, who divorced Lachey nearly three years ago. “But next time, I’m marrying the right one.”

In October, Simpson shot down rumors that she and Romo were getting hitched.

“Tony and I have not gone to Neiman Marcus — somebody said we bought a ring there,” she said. “I couldn’t drag Tony in to Neiman Marcus if I tried.”

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