I decided to stop drinking coffee and for days I had body and head aches that lasted until I started drinking coffee again. Now I just drink less cups per day and a much weaker coffee and that works for me. Yes, probably I am addicted to coffee but as long as I dont over do it, is should be Ok.
Yes, those are addiction signs. I wrote about what coffee does to you in my first post two years ago. You can find the link in this post. That's the scientific explanation.