he Twilight actress — who’s rumored to be dating costar Robert Pattinson – insists she’s a “pretty loyal friend”.   “I’m a pretty loyal friend,” Kristen told Closer magazine. “Once you become part of my clan, I won’t let go of you very quickly. I made such amazing friends [through Twilight], I’ll always keep them close to my heart.”   Kristen also revealed how she likes to spend her spare time.  …