Mental harassment by wife

I write in deep pain with heavy heart: I now fully understand that it i now not possible that I can lead a peaceful happy life with my wife.It is 15 years of marriage.I was fortunate to get the lady I loved that too from a different culture. however my wife started to argue on matters whether small or big shortly after marriage. In one such incident she had said that she married me because she was interested in only my physical self and money and a lavish life.Whatever the matter was she ended up the same in argument. I have lost my mother in an accident few months back. After that she is out of control and argues and blames in everything..she makes me feel whatever she does is a courtesy and I should should be thankful for that. She is a working lady and hence as per her wish she had kept maid for every work in the house.She is backed up by her mother who supports her and guides her without fully understanding the point of view from our end. Now my wife keeps constant 'vigil' on me as she also doubts me.Time and again she wants me to praise her and want me to just listen and say 'yes' to whatever she does and wants. she could start arguing out of nowhere and hence life has become so disturbed that I am scared to go home and worried about our only child. Please help...Please........i have compromised on my life for everything ..just for my family ...