Diet Coke Addict

So last night I was talking online to a friend from High School. (Facebook is amazing. It feels like a big Band/HS reunion online!) He was commenting to me on a status I had posted a few days ago that said "Kelly is worried". He basically asked me "worried about what?" I told him, you know...it's not one thing. It's lots of things. He told me he used to be the same way. So he gave me a few suggestions, one of them being to stop drinking caffeine. I know this will help, but being the addict I am, I have never even thought it was a problem. It doesn't affect me is what I have been thinking for the last 18+ years. What could it hurt though. I told him I was going to give up the caffeine, starting today. It's already 4:30 pm. All I have had today is water and a Diet 7-Up. I can do this.