>>hat is absolutely silly (even stupid). hat you are saying is that you have given this person control even of where you work - even though you have the best boss in the world.
>>
>>Do you say s/he's the 'best boss in the world' in hopes of them reading this and resolving the issue? If so, then ask them to fix it, and if they say no then live with it. Giving a co-worker control over your life (depressed, etc) is NEVER a sensible idea. Period.
>
>The boss is aware of the problem. He is not visiting this site. I do not think he can do anything about it, because you can not force a person (or subordinate) to like or dislike someone.

Right. And you can control only YOU. That is why you must take back CONTROL.
At this moment the antagonist is CONTROLLING YOU. And you must never let that happen, not in work, not in life, not in the family, not in....

TAKE BACK CONTROL NOW... by just making this other person a non-part of your work life, and when you must deal with them keep it short and 'professional'.