I heard in an interview he was asked about dating Rumer Willis, and he said they were just friends, and that media make up all kinds of things. I can't remember what the show was, but I think it was one in his hometown. I also don't know how recent this was.
Most of what I read/hear suggests that he's not dating anyone, or at least isn't talking about it, so clearly it's a private, personal matter, and I respect that.
He was rumored to be dating Rumer Willis 2 years ago. Someone claiming that they saw them together holding hands and beijar at the Hollywood Boulevard. Just searched.
posted over a year ago
myspace says "single" though XD and there r always "celeb couples" rumors EVERWHERE.