In the new issue of Vogue, Kate Bosworth, who's promoting her new movie, 21, about a group of MIT students who beat the system and win tons of cash playing blackjack in Las Vegas, dished on some very personal matters. She talks about her deep relationship with ex-boyfriend Orlando Bloom, her new beau, model/musician James Rousseau, and all that hoopla about her getting super skinny after she and Orlando hit the skids. "Orlando and I met when we were kids," the beauty says of her former flame. "Blue Crush hadn't come out. Lord of the Rings hadn't come out. ... He was the first big heartbreak. ... First love: You feel like it's the be-all and end-all. ... To put as little pressure on the relationship you're in is very important. I regret that it was too intense for both of us." But Kate says that it's important to her that she and Orlando stay pals. "The fact that I'm very close with my past relationships is something I pride myself on. My mom is still close to her first husband. It's nice to be able to enjoy someone in a different form." As for her dramatic weight loss that had everyone talking, Kate says it was due to stress -- and that she never wanted to be that way. "Whenever anything happens that's very painful or stressful, we all lose weight - my mother, my aunt, my grandmother. ... I honestly thought something was wrong with me. ... I was concerned for my health and my fans, the public. I would have said, don't look at this as the standard of some kind of beauty and health. [It was] a very dark time in my life." But Kate's back to a happier place in life, since meeting her new boyfriend James Rosseau at the Marc Jacobs after-party -- even though he had no idea who she was. "I looked like a mess," she recalls. "I always ask him why he didn't turn and walk away. He had no idea who I was. He said, 'You're an actress? You're not Kate Hudson, are you?' For a little while there he called me 'Miss Hudson' as a joke. [Afterward] we left and sang Dylan songs at Maggie's Pub. Sitting on a bar stool, having a beer. He saw the potential. He wanted to fix me in a little way. And to be quite honest, he did. He was such a ray of light in my life."