Brilliant. The way you've put this together is fantastic! Starting it with lines that are short and precise, and ending it with longer, angrier lines brings each stanza a development in the relationship that builds a whole picture that I am certain will be frighteningly familiar to many here on this site.
I find many relationship poems on here rather tiresome and impersonal, but this... This is spectacular. You can be proud of this, make no mistake about it!