Actress Jennifer Aniston has reportedly instructed boyfriend Justin Theroux to marry her or end the relationship. The 43-year-old also says that running after her new dog Sophie gives her the experience of having children. ”I’ll be married by the end of the year. We’re constantly laughing,” contactmusic.com quoted Aniston as saying. ”Justin and I argue over who takes the dog out and who disciplines her, but that’s about it. Things are fabulous. I’m happy. If he’s not got down on one knee, or we’re mot married, by the end of the year, it’s over,” she added.