What Do You Do With Someone Who HATES You?

There is a person who says they hate me, has said so to at least one friend of mine. He makes snide comments in response to things I have said to others. He has made snide comments to me. He has so far refused to "work it out" with me. A mutual friend wants to help us to work it out, but as it stands right now, I don't know if she will succeed in getting the two of us together to work it out or not.

I have grievances against this person, both for picking on, teasing and bullying me and for doing so to others who I care about as well. His "teasing" goes way beyond what is funny. Often folks do NOT laugh. There is nervous laughter sometimes, or just plain nervous silence when he picks on people and calls them names and criticizes them. He can be angry, nasty, sarcastic and in general a very hard person to get along with.

On the other hand, he has some redeeming characteristics too. He took care of his ailing mother for 15 years before she died. He was in the Service and served in WWII.

I have had decent conversations with him about current events, the weather, our lives and out pasts, etc. However, ever since I said in general to everyone one day, that I was not in the mood to be teased, he has considered me an enemy.

What do you do when a person like this hates you?