Should I marry him or call off engagement?

Ok, me and my fiance have been engaged about 2 months now, well ever since i accepted his proposal he has completely changed, he is so mean to me now, disrespectful when he talks to me, always complains about everything I do or don't do. I don't know what to do, should I end our engagement or what can I do or say to make him stop, I've tried talking to him and shockingly he blames me. Big surprise right? HELP!!