Another Day Of Patronising And Intimidation.

Another bad day yesterday, Monday of me being patronised and intimidated by the same person. Yesterday was really bad because the air was heated and wild all because I didn't speak properly on the phone. I was so angry and shaking with nerves. I just couldn't hold my tongue any longer and lashed out and gave as good as I got in return. Why should I have to just sit back and take all the abuse coming to me. If its good enough for him to have ago at me, then its good enough for me to retaliate back in my own defence. I am only nasty if someone is nasty to me, other than that I don't care what anyone says or does as long as it don't affect me.
I can't stand being in the same room as this person. I hate him so much. Not that I would cause him any kind of harm in any way though. I just want this person to go away and leave me alone but, he knows I'm weak!
What right has anyone got to intimidate and patronise another person because they just feel like being in control, its wrong! To be honest, I really thought he was going to hit me at one point. He can if he wants and I will ring the police and tell them what he's doing to me.
He has got worse since he has stopped taking his medication for Bipolar. He is more nastier and abusive towards others in the street and very racist too.
Sometimes I wish the ground would open up and swallow me up or something bad would happen to this other person. 
I have considered taking my own life just so as it all ends but, I don't think I've got the courage to do that.
I don't have any friends. He don't like me talking to my cousin on the phone and wants to know every detail of what was spoke about and says you must know what you spoke about when I can't remember at the time because of the interrogation  he puts me through.He is so controlling. I don't know what to do about this.