There have been many other threads about this same thing. When it all boils down, if she doesn't move when you ask her, you need to keep upping the pressure until she does. This may end up that you have to "pop" her at first. When she does move off, release all pressure. She will learn that it is better to move off when you first ask her or things get uncomfortable.
Yeah, it might be that you have to up the pressure enough to get a response, but your objective will be to resesitize her to pressure, not DEsensitze her. This is one reason that I sometimes have negative feelings to some of the Parelli type excersizes that tend to overly desensitize a horse.
She is looking at you in the round pen because she doesnt' know what you want her to do. Next time you go in the round pen, you decide what you want her to do and keep that up front in your head. If you keep focussed on the goal, don't let her lack of focus sway you, she will see that there is a reason for you putting pressure on. Horses are SO much more comfortable if they know that you have a purpose in mind and once they understand that purpose, they usuall aren't resentful about it, even it means that you popped her once or twice. Things will be clearer for her and it sets things in a feeling of stability; she follows your direction and all is well in the world , instead of her wondering "why are we in here?".
I did a little video on how to get your horse to step out away from you, as a prelude to lunging on a line. It is really a homemade video and doesn't show the next step once they do step out; make them circle. But it might be something fun for you two to play around with.
There are some really good trainers out there who will show this techinque in a professional manner, instead of me fumbling around. But watch it for yuks and giggles.
Look into Chris Irwin on Stateline tack website and Jonathon field has some videos on Youtube about lunging. How to get your horse away from you so you can begin lunging him around a circle