Addendum:
I ended up seeing the movie three times in one week. I liked it more each time I saw it. The first time I was comparing it to the book. The other two times I could just enjoy it for what it was on it's own.
I haven't seen it again as a very deliberate and conscious decision because I was becoming too obsessed (again) and spending all day on the internet looking up anything to do with Twilight, Rob Pattinson, Kristin Stewart or Stephenie Meyers and neglecting the three humans who depend on me for survival. So I had to quit. It was basically the same as going cold turkey for an alcoholic. I can't just have one drink every week or so if I want to be sane! So, for now I'm completely sober. We'll see if I stay that way...