I'm glad you decided to get out of your toxic situation. That is the first step to getting yourself back. The best thing you can do is distance yourself and have little contact or none at all if you can manage. It can be so hard watching someone from a distance self-destruct. Especially someone that you care a great deal about. However, it is alot more tolerable and easier to heal that way. You were not put on this earth to make sure he is ok or show him the way to a better life. That's his job. Good luck on getting your things from your apartment and please make sure to have family or friends with you when you go for safety reasons as well as emotional and moral support.