An alcoholic, crack addict, sex addict, a liar, a cheater.
You already know what the future holds in store for you with this person. Unfortunately you have become so accustomed to being abused by him and accepting being treated like dog s**t on the bottom of his shoe that you have become beat down to the point of madness.
YOu characterize yourself as a good and compassionate person - and I am sure you are. Yet you are obsessing over a convict who has another ( many) women who is NOT a good person, and who has NO compassion for you.
Stick with your therapy and head over to Al Anon too. When you start believing that you are worth more than this garbage things will change for you.
As for his stuff - personally I would ceremoniously burn it to mark the start of my new life but that's just me. At the very least as you have made many efforts to get him to come and get it - throw it away.
Hugs to you - stick around and post often there is a lot of clarity on SR.