04/21/2004 at 01:00 AM EDT
Shoshanna Lonstein, former squeeze of Jerry Seinfeld, blamed their breakup on the fact that she's a party girl and he's a workaholic. Lonstein, now peddling her own lingerie line, broke her silence about her five-year relationship with the comic for the January issue of Details magazine. She was 16 when they met, he was 43. "I mean -- I was in college," she said. Being with Jerry, she explained, "I felt like I was losing myself. I mean, school's fine, but you need more. And there wasn't much else. So I worked out a lot." Lonstein now lives at home with her parents. "I'm not allowed to sleep out -- and nobody is allowed to sleep over. How boring is THAT?"