Mike, I'm not a doctor, nor have I ever been on Cymbalta. However, I can tell you that I have taken many antidepressant/antianxiety medications in the past. I always had the sensation that there was a plate glass window separating me from the world. When you said you felt like you weren't there and were feeling somewhat robatic, that is what it reminded me of. So what you are feeling could well be the side effects of Cymbalta. Ask your psychiatrist about this. OTOH, it could just be your depression, which can have a similar effect. Sometimes it takes trying different meds to find a combination that works best for you.
Hang in there!