The problem is he does not know his religion that well. He would have left it long time ago if he knew what Islam is all about..
Sounds like most Muslims and me when I was a Muslim, too.
Actually he doesn't believe in wife beating and shit like that ..he actually asked me if i am ever gonna beat him up hehe..
Learning about 4:34 made me leave Islam. I had no idea about that verse throughout my Muslim life. Inform him about that verse, and see what he says. Someone did that to me, and my first reaction was to blame it on mistranslations, so make sure you are prepared with all the reliable sources.
Anyway, welcome to the forums! I wish you all the best with you and your boyfriend. I wish I could be more help. Someone here will surely chime in with great advice. <3