Oh, the politics of it all.

I hate being undermined.  Especially in the professional sense. This gets under my skin especially when it's directed towards me and coming from someone that I do not respect.  Had to bite my tongue today.  But we all know how it turns out when these kinds of situation happen all too often - a blow up.  Now, we don't want that kind of scene at work.  So, how do I deal with this person who either thinks I'm stupid or simply hates me for no apparent reason?  Can't simply show her that I know things because she finds fault in all that I do (even though everyone else is singing praises for me).  I've tried showing kindness but that hasn't worked.  Ignoring her doesn't really help because she (yes, it's a female) is in my workplace.  She is nice to everyone else but she does have a bone to pick with me but I don't know why.  I'd like to think it's just jealousy.... Yes, that explains it.... But it doesn't really fixes the problem, does it?  She likes to point out all the "wrong" that I'm doing.  She obviously hates it when I don't take on her suggestions.  She's talking behind my back.  I know because people tell me.  She's not really anyone important.  Her opinions don't really matter.  So, I guess that's it.  I can't control the hows or the whys as to her actions but I can control the way they affect me.  Part of me wants a confrontation.  But is that really wise?  She is not that important but I want to control the situation and stop her from the delusion that she can treat me in such a condescending manner.