The posts above are great.
I can feel your pain and I've been there. I think it's common for even people with years of recovery to abruptly end things, because of the rewiring of their brain, or perhaps as trail mix said, the mindset that is picked up when you are an addict.
You do deserve someone who treats you better. Reach out for support from 12 step groups, therapy, friends and family and then in the future you'll look back and realize that you're in a better place. But it sucks to be here now, I know.