Dealing with  impossible people is hard as they have complete mastery of shifting the blame, you are already guilty, no matter what. you tried to have a civilized discussion about the status of your relationship with the person. Chances are, every such attempt ended in you being blamed for everything.if you accept responsibility for your own faults and resolve to improve yourself.So accept what they say to save self from headaches.Decide now to quit banging your head against a brick wall.Chances are, the more often they blame you, the more they themselves are actually at fault. 
Stay calm.Remember, in their minds, you are at fault for everything! They will have an endless supply of arguments to support thisyour best resources are silence Recognize that you can't convince them that they have any responsibility for the problems between you.  "Everyone else likes me." This is an attempt to shift the blame to you, so don't buy it. It doesn't matter how this person interacts with others. 
The fact is, the way the two of you interact together  is terrible. Realize that this person is hurting you on purpose to improve his or her self-image.Remind yourself that this person's opinion is not necessarily the truth. If you can't (or won't) make a physical departure immediately, make a mental one. In your mind, you've already left the relationship. The only thing left to do is wait for physical reality to reflect that fact.Find a truly wonderful hobby, and focus on it. If you are religious, focus on your religion.