Originally Posted by
sodetermined 
I know he cant' give me anything right now, but why does he always make it out like I am such a bad person, like I don't care about him, I am already with another man, etc? Why can't he just be decent to me????
Blaming you makes it easier to live with himself. Blaming you, projecting about the "new man" gives him reason to go use/drink, find a new woman, and not feel guilty. After all, to him "it's all your fault". You don't have to accept the blame though. You know it's not true. Give the blame back where it belongs.
To him. His actions are his responsibility period. You can't control another person and that includes his choices. Don't accept the blame. You may have to accept that he will never be decent to you. (It's the addiction ruling his life now and it doesn't like you cause you've stopped enabling.)