Thoughts and good sites
So, today I found a good starting place and resource sight, This is War. If it has happened to you, meaning something bad, they probably have a link here. They have an entire page devoted to Sex Addiction. I will say that it does include links to some of the 12-step groups I don't entirely agree with but I will also say that you are only as addicted as you are willing to admit. What I am really saying is that I can't make you give it up until you realize that certain behaviors are a problem.
If you are considering working on the Twelve Steps, I have found some worksheets here. Just change Alcohol to whatever your addiction is.