Thanks for sharing, babefox. I can only imagine being on that ride for 18 years. I was an opiate addict (oxy) for 3 1/2 years, and by the end I feel like I couldn't go on another day. The good news is that recovery is well within reach, and if you commit yourself to it there is a new life waiting for you.
Admitting you have a problem and reaching out for help is the first and most important step in the process. We can't give medical advice, so I think it's important you speak to a professional about your next step. They may or may not recommend suboxone depending your situation. Suboxone can be a life saver if the alternative is living as a junkie or dead, but if being totally off everything is desirable and possible for you, then the downside is you're still opiate dependent and will have to get off it someday.
Have you told anyone in your life about your situation and your desire to quit? All of us addicts get very good at lying and it becomes 2nd nature. If your ready to do this, now is the time to be open and honest with those close to you. There are no secrets in recovery. You will need all the support you can get, and it begins with surrender and honesty. If you are willing to do that, then the rest will fall into place. You may need some type of treatment program, but that all depends on your situation and what's recommended to you by someone who is trained and really knows the details of your situation.
Congratulations on making this big step, and we're here to support you.