Has anyone had any experience with Suboxone? I think my man is depressed!?

My Fiance and I have been on Suboxone 8mg for narcotics addiction for 3 years. I am almost done with my treatment. Him...not so much. he has lost all interest in life, sex, fun, everything. He used to be spontaneous and so happy go lucky and now he's like a bump on a log. I'm not so sure how much longer I can hang on! I want to get married and he doesn't, he did but not anymore. He purposed to me 3 years ago and now he says he doesn't believe in marriage! We have been together for 7 years and ew have a 3 year old daughter and sometimes he lights up for her but never for me! He works All of the time, I know he is at work so I know he's not cheating. He has NO desire for sex, he doesn't talk to any of his friends, he never wants to do anything. I have asked him if he's depressed or if he will go to the Dr. and he says NO! Help! I feel like I'm waisting away with him. I have tried tough love, ultimatums, getting family/friends involved, and of course, I have and will always be h
ere for him. Not sure how to get him to open up, I have tried everything I can possibly think of! The only difference is that he has been on this medication for the same amount of time that he has been acting this way but Dr. say it doesn't have anything to do with the 2. Just thought I would see if anyone else has experienced this. Thanks.
~Getting impatient~

: http://alcoholdrugstreatment.info/has-anyone-had-any-experience-with-suboxone-i-think-my-man-is-depressed