I just don’t get it

How can your man go from cuddling you and madly in love with you for days just like it use to be when you were dating then all the sudden just start treating you like he absolutely hates you and starts trying to control every aspect of your life? I just want to break down. It’s not fair to me and every time I confront him about it he apologizes and then a couple of months later it happens again. I don’t know how to handle this bipolar behavior then when I finally loose my shit I’m in the wrong and out of my mind. Ahhh.