I don't want to mad

This is something I hear from my wife one a weekly or bimonthly basis: "I don't want to be mad at you..."  or "I hate it when you make me hate you".  I don't quite get it though.  I don't really change my opinions or my love or hate, I don't want to be mad so I'm not...I don't understand how my wife has such little control of her emotions and thoughts.  I have never, ever in my life told her I hated her or even disliked her.  Truth is I love her, I can't stand her and I don't like her.  I have held those opinions for years and they are not likely to change.  She is so volatile she goes from yelling at me and chewing me out to crying an apologizing literally withing 5 minutes.