This Valentine's Day weekend, The Hills' Stephanie Pratt is swearing by a strict "no strings attached" policy — and she's sticking to it for a while. The reality star reveals to In Touch why she pulled the plug on her ex-boyfriend. "I wanted to be single," Stephanie explains. "Guys keep asking me why I don't want a boyfriend and I tell them I don't know!" But in the meantime, there's at least one guy that'll keep her busy. "I met him last night — he's a model and really hot," she said at the Armani Exchange Kiss for a Cause event in Santa Monica on February 7. "I want to hook up with him and other guys, too, because I've never really done that, so I think I should." But Stephanie doesn't just want to work the guys; she also wants to work the runways. "I want to work in fashion. Whitney [Port] left People's Revolution, so I'm like 'Lauren [Conrad], hook it up!' "