Hi there!
If I may ask, why do you feel you can't be honest with your therapist? HIPPA laws would prevent the information being shared without your permission.
The topic of using an antidepressant is always sort of a controversial one, whether addiction is involved or not. I personally have had great experiences with antidepressants for my panic disorder, but just taking the medication wasn't enough. I had to work on learning coping skills and other things with a therapist. Therefore, if you DO decide to give it a try, just keep in mind that it isn't a "cure".
Do you have a history of depression or anxiety? Do you feel that a condition like that led to some of your addiction issues? It's VERY common for someone with anxiety, depression, or other untreated mental illness to turn to self medicating away the symptoms with opiates or other drugs (or alcohol).
Addiction often accompanies a mental illness diagnosis, and when it does, extra consideration must be made, as BOTH conditions need to be well managed in order to keep balance. If one isn't being addressed, then chances are good that the other will become a problem too. So, that being said, if you have struggled with some kind of mental illness, and it was left unmanaged, trying an antidepressant would make more sense than if you didn't have those issues to begin with.
In the world of antidepressants, Lexapro is a commonly prescribed one, and it has a pretty high success rate and is easy to tolerate for most people. It's a good first choice of meds IMO. I had great success with Lexapro myself. Of course everyone reacts differently to medications, so trying an antidepressant is largely a trial and error process. You'd have to give it time before you decide if it is helping you or not. It can easily take up to 8 weeks (sometimes even longer) before obvious changes are noticeable.
Whatever you decide, just remember that the medication alone won't be the "fix" you need, whether you're looking to treat a preexisting condition, or whether you're addressing new symptoms of depression, anxiety, etc. Therapy is a must and is a vital component of any treatment plan.
Good luck to you. Let us know what you've decided! If you decide to give it a go, let us know, and we'll share as much info as we can with you about it. If you have an issue with anxiety and depression, I encourage you to check out those forums here as well. A lot of great people on those forums, and it's nice not to feel alone!
Anxiety Community:
http://www.medhelp.org/forums/show/71?camp=msc
Depression Community:
http://www.medhelp.org/forums/show/57?camp=msc