Sounds like you are doing fine, good stuff not contacting him for 3 weeks! If thinking he might be there when you get home or that he may take your belongings is upseting you you need to change the locks. I did that a week into my sitch and I lost alot of fear as a result.
I was going to try to quit smoking at the begining begining but I need the cigs now more than ever. I am gonna try again when I hit the 6 month mark and see if I can do it.
The cigs he left you prove 2 things, he is thinking about you more than you would imagine and he is guilty for what he has done.