Jason, welcome!
Your questions are medically related, and therefore can't be answered even by members who happen to be MDs (I am not). This is not advice, but merely a suggestion for further background info: google "drug use and brain chemistry".
I applaud the fact that you have cut down on your use. If you believe that you are addicted then you will need to make a decision whether to use or to stop using. Normal people react to drugs and alcohol in analog fashion, addicts and drunks react in a binary fashion. If it's on, it's ALL the way on, with predictable results. Simple as that, imo.