You are doing all the right things for you, that's a wonderful accomplishment, but it doesn't make it any less sad/uncomfortable/frustrating when the addiction lives in the same house.
You are doing well to just work around it, and I wish you so much success with your courses.
Please get the mole looked at, as a cancer survivor I know the importance of taking care of things early. If it's just a mole, it will be removed and never bother you again. Win/Win.
Sending hugs and cheering you on.