Defamation and Emotional and Psychological abuse

Good day I have been married for 10 years of which the last 8 years were the most draining, straining and terrible time of my life. My husband has been blaming me non stop for the last 8 years for hacking his devices and spying on him. It is getting worse everytime and there is no stop to his cruelty and the emotional and psychological abuse I am still suffering. Yesterday I was told by one of his co-workers that he is spreading lies about me at his workplace and that everyone working there was told that Iam stealing his money and that I have been hacking and spying on him for 8 years and most shocking of all is that he told them all including his boss that I am on child porn sites. I am shattered and sick to my stomach and I am at wits end. Who needs enemies if you are married to a man you once thought of as my king my everything. Where do I start to pick up the pieces? I am an emotional wreck and use to be a positive, vibrant and loving women. I resigned from a senior position as a sales executive 6 years ago and have been a unappreciated housewife ever since. I work just as hard as he do but what he doesn't realise is that I have been doing it all with so much passion love and care and he surely loves going out of his way to make me feel useless and worthless by his actions and behaviour. I stood by this man through hell when he lost his job and we didn't even have electricity or a decent meal to eat but I am thankful we never went to bed hungry. I stood by him after rumours and allegations and strange events happened where I was pushed to believe he cheated with my best friend which i must tell you that she is the IT expert and i was told by forensic Dept Vodacom that she is in charge of my devices and that I am the one being monitored. He is the one going crazy with all the lies abt me spying, stealing etc and yet he is always the victim. Who is this man. What is the reason for this behaviour and torture he has been putting me through. This is not my prince I married. He loves to see me hurt and emotional and alone. I am tired of the false accusations and the lies and the defamation of my character at his work place and by his family. He loves drama and if there is nothing to argue any he will always make sure to create something and doesn't give a shit who he is hurting in the process. I have been raised with very good morals and believes. My parents did not raise me to be abused verbally,, emotionally, psuchologically. I am just a shadow of the strong independent women I used to be when he married me.I need help what do I do and where do I start.