Just a couple of observations. Abusive men generally are all about controlling their partner--and having that partner leave is the LAST thing they want.
It seems to me one of two things is probably going on here. His claim that he wants "you" to be "over" suggests to me that this is either a flat-out emotional manipulation, designed to get you to become more compliant with his wishes, or he's already got his next hostage lined up and waiting in the wings. You have to be more cautious if #1 is true, because he may flip out if you take him at his word. If #2 is what's going on, then you've got a golden opportunity to get out of this abusive relationship.
Just because he's been possible to live with during his brief bouts of "sobriety" doesn't mean you should continue to live with abuse on the off chance he eventually decides to quit drinking. Furthermore, the abuse may be aggravated by the drinking, but the power/control issues are completely separate. Without his commitment to treatment for those issues, he's likely to continue to be abusive (though maybe less overtly/dramatically so).