The 25-year-old actress - whose relationship with her `Wall Street: Money Never Sleeps` co-star Shia LaBeouf is rumoured to be in trouble -has changed her attitudes to the opposite sex as she has grown older as she previously felt "nervous" about being more than friends with a guy. She said: "I didn`t have a proper boyfriend until I was 19. "I was a bit of a tomboy growing up with my brother and his friends, so I was nervous about that stuff. I`m more romantic now and more easily swept away than when I was 16." The British actress also admitted she still struggles to comprehend her success and has started to keep a diary so she doesn`t forget any special moments. She added to Australia`s Daily Telegraph magazine: "It`s been a crazy ride. It`s a once-in-a-lifetime thing, so I`m writing stuff down and trying to remember it. As surreal as it is, and as much of an honour as it is to work with people you admire, I`m just going to enjoy it. "I get the same feeling every time I get a part I really want. Nothing - not even awards - beats that. When you know it`s your gig, that`s the best feeling in the world."