Who said you have to forgive those who don’t want you to?
For what Syag is describing it would be best to do something therapeutic and get everything into a context in which you are able to be at ease even in that person’s company.
For example, if your camel swallowed your jeep keys, which gave you a lot of trouble, you might be mad at the moment. However, when the situation is over and you are back in bed, you realize that it is just a camel. No, you won’t trust it anymore, it is dumb, it is moody. But that’s that.
There are people whom I don’t trust, there are people who have poor judgment, are over-zealous, selfish, shallow or bad conversationalists. Now that you suffered from that aspect you are able to classify the person and you understand how to relate to that individual. In the old, undefined, context they are a mess and they ruin you. In the new context, he might be a camel. So smile nicely but stand back, for he might eat your jacket.